{"id":25066,"date":"2026-08-28T12:26:43","date_gmt":"2026-08-28T06:56:43","guid":{"rendered":"https:\/\/www.fusioncharts.com\/blog\/?p=25066"},"modified":"2026-08-28T13:29:24","modified_gmt":"2026-08-28T07:59:24","slug":"what-is-an-line-chart-and-how-does-it-work","status":"publish","type":"post","link":"https:\/\/www.fusioncharts.com\/blog\/what-is-an-line-chart-and-how-does-it-work\/","title":{"rendered":"What Is a Line Chart? A Complete Guide to Uses, Types, and Best Practices"},"content":{"rendered":"<p><b>TL;DR<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">A line chart plots data points along an x-axis (time) and y-axis (value), connected by line segments to show trends at a glance.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Use it to track change over time, spot spikes and dips, and compare multiple series: sales, stock prices, traffic, weather.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Keep to 4 lines max, use equal time intervals, and pick your baseline carefully to avoid misleading readers.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">FusionCharts offers 7+ variants: multi-series, zoom &amp; pan, scroll, multi-axis, spline, multi-series spline, step-line, each built for a different data challenge.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Line charts, including what many people search for as a &#8220;number line chart&#8221;, are one of the most fundamental tools in data visualization, and for good reason. Building one is simple: plot two variables, an x-axis (often time) and a y-axis (the value you&#8217;re measuring), then connect the points. This makes them ideal for tracking change and comparing multiple data sets side by side, which is why they show up everywhere, from sales dashboards to stock tickers to website analytics.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">In this guide, we&#8217;ll cover what a line chart is, why it&#8217;s essential, where it falls short, how to pick the right variant for your data, and how to build one with FusionCharts.<\/span><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_71 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\"><p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<\/div><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.fusioncharts.com\/blog\/what-is-an-line-chart-and-how-does-it-work\/#What_Is_a_Line_Chart\" title=\"What Is a Line Chart?\">What Is a Line Chart?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.fusioncharts.com\/blog\/what-is-an-line-chart-and-how-does-it-work\/#Why_Do_You_Need_a_Line_Chart\" title=\"Why Do You Need a Line Chart?\">Why Do You Need a Line Chart?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.fusioncharts.com\/blog\/what-is-an-line-chart-and-how-does-it-work\/#1_To_See_Changes_in_a_Dependent_Variable_Over_Time\" title=\"1. To See Changes in a Dependent Variable Over Time\">1. To See Changes in a Dependent Variable Over Time<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.fusioncharts.com\/blog\/what-is-an-line-chart-and-how-does-it-work\/#2_To_Identify_Trends_and_Spot_Spikes_and_Dips\" title=\"2. To Identify Trends and Spot Spikes and Dips\">2. To Identify Trends and Spot Spikes and Dips<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.fusioncharts.com\/blog\/what-is-an-line-chart-and-how-does-it-work\/#3_To_Compare_Patterns_Across_Multiple_Segments\" title=\"3. To Compare Patterns Across Multiple Segments\">3. To Compare Patterns Across Multiple Segments<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.fusioncharts.com\/blog\/what-is-an-line-chart-and-how-does-it-work\/#What_are_the_Popular_Business_Uses_of_Line_Charts\" title=\"What are the Popular Business Uses of Line Charts?\">What are the Popular Business Uses of Line Charts?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.fusioncharts.com\/blog\/what-is-an-line-chart-and-how-does-it-work\/#What_are_the_Limitations_of_Line_Charts\" title=\"What are the Limitations of Line Charts\">What are the Limitations of Line Charts<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.fusioncharts.com\/blog\/what-is-an-line-chart-and-how-does-it-work\/#1_Theyre_Bad_at_Representing_Too_Many_Groups_at_Once\" title=\"1. They&#8217;re Bad at Representing Too Many Groups at Once\">1. They&#8217;re Bad at Representing Too Many Groups at Once<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.fusioncharts.com\/blog\/what-is-an-line-chart-and-how-does-it-work\/#2_Irregular_Class_Intervals_Can_Give_Inaccurate_Insights\" title=\"2. Irregular Class Intervals Can Give Inaccurate Insights\">2. Irregular Class Intervals Can Give Inaccurate Insights<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.fusioncharts.com\/blog\/what-is-an-line-chart-and-how-does-it-work\/#What_are_the_Best_Practices_for_Line_Charts\" title=\"What are the Best Practices for Line Charts?\">What are the Best Practices for Line Charts?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.fusioncharts.com\/blog\/what-is-an-line-chart-and-how-does-it-work\/#What_are_the_Different_Variants_of_Line_Charts\" title=\"What are the Different Variants of Line Charts?\">What are the Different Variants of Line Charts?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.fusioncharts.com\/blog\/what-is-an-line-chart-and-how-does-it-work\/#Line_with_Multiple_Series\" title=\"Line with Multiple Series\">Line with Multiple Series<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.fusioncharts.com\/blog\/what-is-an-line-chart-and-how-does-it-work\/#Line_Chart_with_Zooming_Panning\" title=\"Line Chart with Zooming &amp; Panning\">Line Chart with Zooming &amp; Panning<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.fusioncharts.com\/blog\/what-is-an-line-chart-and-how-does-it-work\/#Line_Chart_with_Scrolling\" title=\"Line Chart with Scrolling\">Line Chart with Scrolling<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.fusioncharts.com\/blog\/what-is-an-line-chart-and-how-does-it-work\/#Line_Chart_with_Multiple_Axes_Series\" title=\"Line Chart with Multiple Axes &amp; Series\">Line Chart with Multiple Axes &amp; Series<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.fusioncharts.com\/blog\/what-is-an-line-chart-and-how-does-it-work\/#Simple_Spline_Chart\" title=\"Simple Spline Chart\">Simple Spline Chart<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.fusioncharts.com\/blog\/what-is-an-line-chart-and-how-does-it-work\/#Spline_Chart_with_Multiple_Series\" title=\"Spline Chart with Multiple Series\">Spline Chart with Multiple Series<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.fusioncharts.com\/blog\/what-is-an-line-chart-and-how-does-it-work\/#Step-Line_Chart\" title=\"Step-Line Chart\">Step-Line Chart<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.fusioncharts.com\/blog\/what-is-an-line-chart-and-how-does-it-work\/#How_to_Create_a_Line_Chart_with_FusionCharts\" title=\"How to Create a Line Chart with FusionCharts\">How to Create a Line Chart with FusionCharts<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.fusioncharts.com\/blog\/what-is-an-line-chart-and-how-does-it-work\/#How_to_Choose_Right_Line_Chart_for_Your_Data\" title=\"How to Choose Right Line Chart for Your Data\">How to Choose Right Line Chart for Your Data<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.fusioncharts.com\/blog\/what-is-an-line-chart-and-how-does-it-work\/#Conclusion\" title=\"Conclusion\">Conclusion<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.fusioncharts.com\/blog\/what-is-an-line-chart-and-how-does-it-work\/#Ready_to_see_it_in_action\" title=\"Ready to see it in action?\u00a0\">Ready to see it in action?\u00a0<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"What_Is_a_Line_Chart\"><\/span><b>What Is a Line Chart?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">A line chart represents data over a continuous time span, generally to show the trend of a measure (or variable) over time. Data values are plotted as points, then connected using line segments.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Using a line chart, you can trace the pattern of any dependent variable over time, such as share price, EPS (earnings per share) of a company, or <\/span><a href=\"https:\/\/www.fusioncharts.com\/dashboards\/smart-weather-dashboard\/\"><span style=\"font-weight: 400;\">weather recordings<\/span><\/a><span style=\"font-weight: 400;\"> like temperature, precipitation, or humidity. They are also great for comparing how data changes across multiple groups over the same time period.\u00a0<\/span><\/p>\n<p><a href=\"https:\/\/www.fusioncharts.com\/charts\/line-area-charts\"><span style=\"font-weight: 400;\">Explore more line chart examples in the FusionCharts gallery \u2192<\/span><\/a><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium\" src=\"https:\/\/img.lightshot.app\/B0qwXjwSTM6Jjx5YcWdK2Q.png\" alt=\"teens comparssion using different social medias channels\" width=\"553\" height=\"375\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Why_Do_You_Need_a_Line_Chart\"><\/span><b>Why Do You Need a Line Chart?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Line charts earn their place in every analyst&#8217;s toolkit for three key reasons:\u00a0<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"1_To_See_Changes_in_a_Dependent_Variable_Over_Time\"><\/span><b>1. To See Changes in a Dependent Variable Over Time<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Line charts are excellent for mapping continuous data sets over a period of time. Understanding change over time is relatively easy for the human mind to process. Business owners want to see profits increase over time, content publishers want to see traffic increase over time, and public bodies want to track tax, health, or infrastructure data over time. It gives you the best context for understanding what&#8217;s happening \u2014 and how to plan for the future.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium\" src=\"https:\/\/img.lightshot.app\/o9om5I1YTmGBTABbhltWYg.png\" alt=\"population growth rate visual with line chart\" width=\"543\" height=\"397\" \/><\/p>\n<p><span style=\"font-weight: 400;\">UN Population Projection of the world until 2100. Source: <\/span><a href=\"https:\/\/ourworldindata.org\/grapher\/population-growth-rates?country=\"><span style=\"font-weight: 400;\">Our World In Data<\/span><\/a><\/p>\n<h3><span class=\"ez-toc-section\" id=\"2_To_Identify_Trends_and_Spot_Spikes_and_Dips\"><\/span><b>2. To Identify Trends and Spot Spikes and Dips<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Line charts help you observe trends and identify key performance issues, good or bad. A line chart lets you pinpoint the exact moment something out of the ordinary happened, which helps you know exactly where to dig for answers.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium\" src=\"https:\/\/img.lightshot.app\/fKZMD56eRpqe7v-Tb_xBPA.png\" alt=\"interest over rate performance line chart\" width=\"559\" height=\"211\" \/><\/p>\n<p><span style=\"font-weight: 400;\">A Simple Line chart from <\/span><a href=\"https:\/\/trends.google.com\/trends\/explore?date=all&amp;geo=US&amp;q=fidget%20spinners\"><span style=\"font-weight: 400;\">Google<\/span><\/a><span style=\"font-weight: 400;\"> Trends shows the interest in Fidget Spinners in the United States from 2004 &#8211; 2018. It is easily evident that they were quite a fad in 2017<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"3_To_Compare_Patterns_Across_Multiple_Segments\"><\/span><b>3. To Compare Patterns Across Multiple Segments<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Multi-series line charts let you compare how different groups \u2014 however they&#8217;re segmented, whether by geography, internal teams, age groups, or financial quarters \u2014 are performing against each other. This helps you identify high-performing areas and isolate conditions that are dragging results down.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium\" src=\"https:\/\/img.lightshot.app\/_erdIzUPRuKC2okrby-JNg.png\" alt=\"Multi-series line charts\" width=\"571\" height=\"360\" \/><\/p>\n<p><span style=\"font-weight: 400;\">A multi-series line chart showing sales performance across different quarters, a visual example of the &#8220;<\/span><a href=\"https:\/\/www.vectorconsulting.in\/insights-publications\/consumer-industry-insights\/the-hockey-stick-syndrome\/\"><span style=\"font-weight: 400;\">hockey stick&#8221; pattern<\/span><\/a><span style=\"font-weight: 400;\"> that results from quarterly sales commission cycles, as reps push to hit quota before each deadline<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"What_are_the_Popular_Business_Uses_of_Line_Charts\"><\/span><b>What are the Popular Business Uses of Line Charts?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Line charts aren&#8217;t just an analyst&#8217;s tool; they show up across nearly every business function. Here are some of the most popular business uses of line charts:<\/span><\/p>\n<ol>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Finance and investing: <\/b><span style=\"font-weight: 400;\">Tracking stock prices, portfolio value, or revenue and expenses across quarters.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Sales and marketing: <\/b><span style=\"font-weight: 400;\">Visualizing lead generation, conversion rates, or campaign performance over a launch period.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Web and product analytics:<\/b><span style=\"font-weight: 400;\"> Monitoring daily active users, page views, or churn rate trends.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Operations and supply chain: <\/b><span style=\"font-weight: 400;\">Plotting inventory levels, shipment volumes, or delivery times over time.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Healthcare<\/b><span style=\"font-weight: 400;\">: Charting patient vitals, recovery timelines, or disease case counts are also a popular business use of line charts.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Climate and environmental reporting: <\/b><span style=\"font-weight: 400;\">Visualizing temperature, rainfall, or emissions trends across years or decades.<\/span><\/li>\n<\/ol>\n<p><span style=\"font-weight: 400;\">Because a single line chart can flex across so many use cases, it&#8217;s often the first chart type teams reach for when a stakeholder asks, &#8220;how are we trending?&#8221;<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium\" src=\"https:\/\/img.lightshot.app\/_bQ4zL0PRl-PqskevNaCRA.png\" alt=\"most popular business uses of line charts\" width=\"520\" height=\"381\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"What_are_the_Limitations_of_Line_Charts\"><\/span><b>What are the Limitations of Line Charts<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"1_Theyre_Bad_at_Representing_Too_Many_Groups_at_Once\"><\/span><b>1. They&#8217;re Bad at Representing Too Many Groups at Once<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Plotting too many lines on a single chart makes it appear cluttered. Experts advise no more than four lines on a single chart; any more than that, and it becomes difficult to interpret. If you need to show more than four groups, consider grouping smaller ones into an &#8220;Others&#8221; category, or switch to a bar chart, which handles a larger number of groups more gracefully.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium\" src=\"https:\/\/img.lightshot.app\/ty6Y5hgmQXC335la9J21dQ.png\" alt=\"too many groups in line charts\" width=\"559\" height=\"343\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Line charts are not great at showing lots of groups. If you have a lot of groups, use a <\/span><a href=\"https:\/\/www.fusioncharts.com\/charts\/column-bar-charts\/simple-bar-chart\"><span style=\"font-weight: 400;\">bar chart<\/span><\/a><span style=\"font-weight: 400;\"> to compare them.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"2_Irregular_Class_Intervals_Can_Give_Inaccurate_Insights\"><\/span><b>2. Irregular Class Intervals Can Give Inaccurate Insights<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Data should always be plotted at equal intervals for the lines to accurately represent reality. When a line chart connects unequal or non-adjacent time intervals, it misrepresents the underlying information. Even when the interval is regular, using too many or too few classes can mask important patterns in the data.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium\" src=\"https:\/\/img.lightshot.app\/66IuAXyhQleVjt_I6UTw5w.png\" alt=\"line chart showing the difference of presence of computer\" width=\"433\" height=\"330\" \/><\/p>\n<p><span style=\"font-weight: 400;\">You simply can&#8217;t compare equal intervals for some data points and then switch to a different interval and expect the result to be a meaningful trend line. If any decline occurred in a date range that wasn&#8217;t plotted, the resulting chart could mask it entirely, leading to inaccurate insights.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"What_are_the_Best_Practices_for_Line_Charts\"><\/span><b>What are the Best Practices for Line Charts?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Follow these guidelines to keep your line charts clear, accurate, and easy to act on:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Use lines only to connect adjacent values along an interval scale.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Keep intervals equal in size to ensure accurate insights.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">When the focus is on a single line&#8217;s trend, call out the highest and lowest values to add helpful context.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Choose a baseline that suits your data; a zero baseline doesn&#8217;t always represent change effectively.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">When comparing data sets, line charts are only useful if all axes follow the same scale.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">For smaller devices, use <\/span><a href=\"https:\/\/www.fusioncharts.com\/charts\/spark-charts\/simple-sparkline-chart\"><span style=\"font-weight: 400;\">Sparklines<\/span><\/a><span style=\"font-weight: 400;\">; keep the data-to-ink ratio high by removing unnecessary elements like axis lines and titles.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Ensure smooth interactivity: cross-lines with anchors and values, dimming other lines on hover, and responsive legend interactions all improve readability.\u00a0<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Learn more about <\/span><a href=\"https:\/\/www.fusioncharts.com\/dev\/chart-guide\/chart-configurations\/anchors-and-lines\"><span style=\"font-weight: 400;\">configuring anchors and lines<\/span><\/a><span style=\"font-weight: 400;\">.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"What_are_the_Different_Variants_of_Line_Charts\"><\/span><b>What are the Different Variants of Line Charts?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Line_with_Multiple_Series\"><\/span><b>Line with Multiple Series<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">The <\/span><a href=\"https:\/\/www.fusioncharts.com\/charts\/line-area-charts\/line-chart-with-multiple-axes-and-series\"><span style=\"font-weight: 400;\">multi-series line chart<\/span><\/a><span style=\"font-weight: 400;\"> visualizes trends and relationships across multiple datasets. It consists of various data points connected using line segments, where each point represents a single value, helping you compare different groups on the same scale to see how each is performing relative to the others.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium\" src=\"https:\/\/img.lightshot.app\/Ej9Sx7WPQQeyAOUzXkpoMg.png\" alt=\"line chart shows the reach of social media platfroms to the youth\" width=\"559\" height=\"362\" \/><\/p>\n<h4><b>Example use cases:<\/b><\/h4>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Comparing hourly temperatures across Boston, New York, Princeton, and Miami on a given day.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Comparing closing stock prices of Apple, IBM, Microsoft, Amazon, and Facebook over a quarter.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Comparing salesperson performance within an organization.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Tracking a country&#8217;s import-export trend.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Comparing metrics like retention rate or new sales across time zones or products.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Documentation: <\/span><a href=\"https:\/\/www.fusioncharts.com\/charts\/line-area-charts\/line-chart-with-multiple-series\"><span style=\"font-weight: 400;\">Live example<\/span><\/a><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Line_Chart_with_Zooming_Panning\"><\/span><b>Line Chart with Zooming &amp; Panning<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">The <\/span><a href=\"https:\/\/www.fusioncharts.com\/dev\/chart-guide\/standard-charts\/zoom-line-charts\"><span style=\"font-weight: 400;\">zoom line chart<\/span><\/a><span style=\"font-weight: 400;\"> is a special type of multi-series line chart that allows analysis of thousands of data points at both macroscopic and microscopic levels. Zooming and panning make this kind of analysis efficient. It consists of multiple lines, where each line represents a category, and can easily plot thousands of data points, something that would produce indecipherable results on an ordinary line chart.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium\" src=\"https:\/\/img.lightshot.app\/akr20D9mSjCjfauGDJtbcg.png\" alt=\"difference in houses leased or sold across usa in 2017 by line chart\" width=\"584\" height=\"367\" \/><\/p>\n<h4><b>Example use cases:<\/b><\/h4>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Large-scale reporting, like nationwide logistics performance across multiple quarters.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Analyzing healthcare data for patients across geographies and conditions over decades.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Tracking stock data across industries over the years.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Monitoring daily web traffic on a website over six months.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Tracking daily minimum and maximum temperatures for a location over five years.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Documentation: <\/span><a href=\"https:\/\/www.fusioncharts.com\/dev\/\"><span style=\"font-weight: 400;\">Zoom\/Pan\/Scroll features<\/span><\/a><span style=\"font-weight: 400;\"> \u00b7 <\/span><a href=\"https:\/\/www.fusioncharts.com\/charts\/line-area-charts\/line-chart-with-zooming-and-panning\"><span style=\"font-weight: 400;\">Live example<\/span><\/a><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Line_Chart_with_Scrolling\"><\/span><b>Line Chart with Scrolling<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">A <\/span><a href=\"https:\/\/www.fusioncharts.com\/charts\/line-area-charts\/line-chart-with-scrolling-only\"><span style=\"font-weight: 400;\">scroll line chart<\/span><\/a><span style=\"font-weight: 400;\"> shows the magnitude of change over a period of time. Because of its scroll interactivity, it can render a large number of data points without overwhelming the canvas. Data values are plotted as points connected by line segments, with a horizontal scroll bar rendered at the bottom of the chart for navigation.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium\" src=\"https:\/\/img.lightshot.app\/ASwXY79vS2amflyom8XfAQ.png\" alt=\"Deaths reports of death caused by mosquito in india line chart\" width=\"580\" height=\"370\" \/><\/p>\n<h4><b>Example use cases:<\/b><\/h4>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Plotting a large number of data points, like monthly sales across multiple years.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Tracking the trend of a country&#8217;s military spending as a percent of GDP across the last century.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Documentation: <\/span><a href=\"https:\/\/www.fusioncharts.com\/charts\/line-area-charts\/line-chart-with-scrolling-only\"><span style=\"font-weight: 400;\">Live example<\/span><\/a><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Line_Chart_with_Multiple_Axes_Series\"><\/span><b>Line Chart with Multiple Axes &amp; Series<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">A <\/span><a href=\"https:\/\/www.fusioncharts.com\/charts\/line-area-charts\/line-chart-with-multiple-axes-and-series\"><span style=\"font-weight: 400;\">multi-axis line chart<\/span><\/a><span style=\"font-weight: 400;\"> is an interactive line chart that plots data using multiple axes, letting you plot data sets with different units and scale ranges. Data values are plotted as points connected by line segments, with multiple y-axes rendered along the left and right sides of the chart.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium\" src=\"https:\/\/img.lightshot.app\/rTrgsAf-QyqCXxC5CRiBUQ.png\" alt=\"IBRD Subscriptions and voting powers\" width=\"579\" height=\"323\" \/><\/p>\n<h4><b>Where to use it:<\/b><\/h4>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Comparing web visits and downloads across multiple sources.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Comparing rainfall and temperature for a city.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Comparing GDP and GDP growth percentage for a country over the last decade.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Documentation: <\/span><a href=\"https:\/\/www.fusioncharts.com\/dev\/chart-guide\/standard-charts\/combination-charts\"><span style=\"font-weight: 400;\">Dual y-axis combination charts<\/span><\/a><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Simple_Spline_Chart\"><\/span><b>Simple Spline Chart<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">A <\/span><a href=\"https:\/\/www.fusioncharts.com\/charts\/spark-charts\/simple-sparkline-chart\"><span style=\"font-weight: 400;\">spline chart<\/span><\/a><span style=\"font-weight: 400;\"> is a specialized form of the line chart used for plotting data that requires curve-fitting. Like a line chart, data values are plotted as points \u2014 but instead of straight line segments, this chart draws a fitted curve connecting them.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium\" src=\"https:\/\/img.lightshot.app\/EWTdePXLQwOLNCHGGrbdog.png\" alt=\"Average monthly temperature in texas representation with line chart\" width=\"566\" height=\"303\" \/><\/p>\n<h4><b>Where to use it:<\/b><\/h4>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Rendering the impulse response of a system or the development lifecycle for a product.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Comparing company revenue year over year for the last decade.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Comparing electricity consumption across a city.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Documentation: <\/span><a href=\"https:\/\/www.fusioncharts.com\/dev\/chart-attributes\/spline\"><span style=\"font-weight: 400;\">Spline chart attributes<\/span><\/a><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Spline_Chart_with_Multiple_Series\"><\/span><b>Spline Chart with Multiple Series<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">A <\/span><a href=\"https:\/\/www.fusioncharts.com\/charts\/line-area-charts\/spline-chart-with-multiple-series\"><span style=\"font-weight: 400;\">multi-series spline chart<\/span><\/a><span style=\"font-weight: 400;\"> is a specialized form of the multi-series line chart, also built for curve-fitted data, but across multiple categories at once. Like the multi-series line chart, data values are plotted as points; instead of straight segments, a fitted curve connects them.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium\" src=\"https:\/\/img.lightshot.app\/oExQc0PwTteKvEqqW8J8YA.png\" alt=\"recieved vs resolved supports tickets line chart data\" width=\"567\" height=\"311\" \/><\/p>\n<h4><b>Where to use it:<\/b><\/h4>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Rendering the impulse response for multiple systems, or the development lifecycle for multiple products.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Comparing company revenue across multiple decades.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Comparing electricity consumption across various cities in a state.<\/span><\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Step-Line_Chart\"><\/span><b>Step-Line Chart<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">A <\/span><a href=\"https:\/\/www.fusioncharts.com\/charts\/line-area-charts\/step-line-chart\"><span style=\"font-weight: 400;\">step-line chart<\/span><\/a><span style=\"font-weight: 400;\"> visualizes trends for events that aren&#8217;t continuous in nature. For a given data set, it lets you compare the magnitude and change in values at different points of the same series while also helping you discern intermittent patterns in the trend. Data values are plotted as points connected using vertical and horizontal lines, forming a step-like progression.<\/span><\/p>\n<h3><b><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium\" src=\"https:\/\/img.lightshot.app\/pJSUOKbrRL-nNgwc0m5BHg.png\" alt=\"postal rates for first class stamp with line chart\" width=\"519\" height=\"351\" \/><\/b><\/h3>\n<h4><b>Where to use it:<\/b><\/h4>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Showcasing a revenue-and-expense comparison for a company.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Comparing renewable vs. non-renewable energy production.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Tracking enrollments each year at an academic institute.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Documentation: <\/span><a href=\"https:\/\/www.fusioncharts.com\/dev\/chart-guide\/standard-charts\/step-line-chart\"><span style=\"font-weight: 400;\">Step line chart guide<\/span><\/a><\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_to_Create_a_Line_Chart_with_FusionCharts\"><\/span><b>How to Create a Line Chart with FusionCharts<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Getting a line chart on the page with FusionCharts follows the same basic pattern across variants:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Structure your data in JSON (or XML), with each data point mapped to a label and a value.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Set the type attribute to the chart variant you need: line, msline (multi-series), zoomline, multiaxisline, spline, msspline, or stepline2d.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Set the renderAt attribute to the container where the chart should render.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Define width and height for the chart dimensions.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Set dataFormat to match your data structure (JSON or XML).<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Customize cosmetics: anchors, colors, tooltips, and axis labels, using the relevant chart attributes reference.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">For handling very large data sets (10,000+ points) without cluttering the canvas, FusionCharts also supports data-skipping controls like plotBinSize and labelBinSize, covered in the<\/span><a href=\"https:\/\/www.fusioncharts.com\/dev\/chart-guide\/standard-charts\/line-area-and-column-charts\"><span style=\"font-weight: 400;\"> line, area, and column chart guide<\/span><\/a><span style=\"font-weight: 400;\">.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_to_Choose_Right_Line_Chart_for_Your_Data\"><\/span><b>How to Choose Right Line Chart for Your Data<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Choosing the right line chart is just as important as collecting accurate data. The right visualization makes trends easy to understand, while the wrong one can confuse your audience and lead to poor decisions. Here is a quick overview of how to choose right line chart for your data:<\/span><\/p>\n<table>\n<tbody>\n<tr>\n<td><b>If you need to<\/b><\/td>\n<td><b>Use this variant<\/b><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Track one metric over time<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Simple line chart<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Compare a handful of groups on the same scale<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Multi-series line chart<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Explore thousands of data points at both a macro and micro level<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Zoom line chart<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Fit a large data set into a compact dashboard space<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Scroll line chart<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Compare metrics with different units or scales<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Multi-axis line chart<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Show a smoothed trend instead of sharp angles<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Spline chart<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Show smoothed trends across multiple categories<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Multi-series spline chart<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Visualize non-continuous, event-based changes<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Step-line chart<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span><b>Conclusion<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Line charts remain one of the most versatile ways to make sense of change over time, but the &#8220;right&#8221; line chart depends entirely on your data&#8217;s shape, scale, and volume. Whether you&#8217;re tracking a single KPI or comparing thousands of data points across categories, FusionCharts&#8217; line chart family has a variant built for the job.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Ready_to_see_it_in_action\"><\/span><b>Ready to see it in action?\u00a0<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><a href=\"https:\/\/resources.fusioncharts.com\/download-free-trial\/\"><span style=\"font-weight: 400;\">Start your free FusionCharts trial<\/span><\/a><span style=\"font-weight: 400;\"> and build your first interactive line chart in minutes, no credit card required.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>TL;DR A line chart plots data points along an x-axis (time) and y-axis (value), connected by line segments to show trends at a glance. Use it to track change over time, spot spikes and dips, and compare multiple series: sales, stock prices, traffic, weather. Keep to 4 lines max, use equal time intervals, and pick [&hellip;]<\/p>\n","protected":false},"author":92,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17,1219,709,722],"tags":[1407,1218,105,1231,1420],"coauthors":[1377],"class_list":["post-25066","post","type-post","status-publish","format-standard","hentry","category-charting-guidelines","category-charts","category-dashboard","category-fusioncharts","tag-chart-types","tag-data-analysis","tag-data-visualization","tag-line-graphs","tag-trendanalysis"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What Is a Line Chart? 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