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15+ Line Chart Examples for Visualizing Complex Data

Written by: Danesh Ramuthi

Sep 19, 2023

Line Chart Examples

Unlock the extraordinary capabilities of data visualization with line charts—your essential navigational tool for demystifying intricate data sets. Whether you’re grappling with the ups and downs of population growth, tracing the zigzags of sales forecasts or dissecting the nuanced oscillations in climate change data, line charts serve as a universal language for data interpretation. 

Our curated collection of line chart examples takes you on a journey that turns complexity into clarity, one line at a time. It doesn’t matter if you’re a data visualization novice or a seasoned analyst, our examples serve as a rich repository of inspiration and practical application.

With Venngage Line Graph Maker, creating compelling, professional-quality line charts is easier than ever. And if you’re short on time or design skills, our pre-made line chart templates will help you without compromising on sophistication or precision. 


Click to jump ahead: 

What is a line chart?

A line chart, also known as a line graph, is a type of graphical representation used to display information that changes over time. 

At its core, a line chart connects individual data points with straight lines to form a continuous curve, thus providing a visual narrative of how a specific variable has changed or is expected to change over a designated time period.

The utility of line charts extends far beyond merely plotting a set of numbers. When thoughtfully designed, these charts can unearth trends, expose inconsistencies and even forecast future scenarios. 

This makes line charts an indispensable tool in a multitude of domains—from finance and healthcare to education and climate science.

Graph Template

What are line charts used for? 

Line charts are a versatile tool used for a variety of purposes across different sectors. They are particularly adept at showing trends over time, enabling viewers to quickly grasp the development or behavior of a particular variable. Here are some common applications:

  1. Trend analysis: Whether it’s a 10-year history of inflation rates or a month-long record of daily temperatures, line charts are excellent for identifying trends.
  2. Forecasting: Businesses often use line charts to make sales or revenue projections, helping stakeholders make informed decisions.
  3. Performance monitoring: In the field of healthcare, line charts can track patient vital signs over time, while businesses might use them to monitor quarterly revenue or performance metrics.
  4. Scientific research: Researchers employ line charts to represent data from experiments, often comparing multiple sets of information.
  5. Finance and stock markets: Investors use line charts to track stock prices, foreign exchange rates or other financial metrics over time.
Product Sales Line Chart Template

Line chart examples for visualizing complex data

Supply & demand chart

Supply and demand charts are a cornerstone in economics to explain market behavior. By plotting supply and demand curves on a chart, one can determine equilibrium price and quantity levels.

Money Supply and Demand Graph

This type of line chart is crucial for policy formulation and understanding market dynamics.

Economics Supply and Demand Graph

Population growth line chart

Population growth line charts offer a longitudinal view of population changes over time, which is essential for urban planning, resource allocation and social services. 

Line Graph Template

These charts can show spikes in population, periods of stagnation or even decline, providing valuable insights for decision-makers.

England Population Growth Line Chart Template

Sales projection line chart

For businesses, sales projection line charts are invaluable. 

Sales Projection With Uncertainty Line Chart Template

They offer a visual forecast of future sales, helping managers and executives plan for inventory, staffing and other resources. 

Sales Projections Line Chart Template

The graph can also include past sales data to show how projections align with reality.

Simple line chart

Sometimes, simplicity is key. A simple line chart might plot only one variable over time, but it can still provide a wealth of information. 

Modern Line Chart Template

For instance, tracking your average customer service response time can provide insights into customer’s satisfactions, helping you make better business decisions.

Lemon Yellow Line Chart Template

Multiple line chart

In a multiple line chart, two or more lines represent different variables on the same graph. 

Example Of Line Graph

This is useful for comparisons, like tracking the performance of multiple products or comparing the GDP growth rates of different countries.

Line Graph Template

Market equilibrium graph

Similar to a supply and demand chart but often more specialized, a market equilibrium graph shows where demand meets supply for a specific market or commodity, serving as a crucial tool for investors, policymakers and industry analysts.

Market Equilibrium Graph

What are some tips for interpreting line charts effectively?

Being able to effectively interpret a line chart is crucial in various settings such as business, research, and casual data exploration. The insights gained from a well-constructed chart can be invaluable.

Identifying Trends

One of the initial focuses when looking at a line chart should be to identify the trend. Line charts excel in displaying patterns and developments over time. Observing the general direction of the line(s) provides a quick understanding of overarching trends.

Scrutinizing the Y-Axis Scale

It’s critical to examine the scale used on the Y-axis. Manipulating the scale can either exaggerate or understate the real changes in the data, affecting your interpretation.

Anomalies and Points of Interest

Look for any anomalies such as outliers, spikes, or sudden dips in the lines. These deviations could be significant and may require further investigation to understand their causes and impacts.

Interactions Between Multiple Lines

If the chart contains multiple lines, observe their interaction or correlation. Check if the lines move in parallel, indicating a direct relationship, or diverge from each other, possibly suggesting an inverse relationship.

Attention to Chart Components

Don’t overlook the various components of the chart, including titles, legends, and axis labels. These elements provide crucial context that aids in accurate and thorough interpretation.

Profit Line Chart Template

What are the key components of a line chart, and what do they signify?

Understanding the key components of a line chart is crucial for both creating and interpreting them effectively. A typical line chart consists of several essential elements, each serving a unique purpose to bring clarity and context to the data being presented. 

1. Title

Typically positioned at the top, the title briefly describes what the chart aims to convey. It helps set the stage for the viewer’s understanding.

2. Legend

When a chart includes more than one variable or category, a legend specifies which line corresponds to each set of data. Legends add an extra layer of clarity, especially in complex charts.

3. Source

The source of the data is often mentioned at the bottom or in an accompanying note. Knowing the source establishes the chart’s credibility and allows viewers to assess the reliability of the information presented.

4. Y-Axis

The Y-Axis usually displays the dependent variable or the metric being observed

5. Data Points and Lines

The plot consists of individual data points, which represent the raw numbers. These points are connected by lines to reveal patterns or trends over time, forming the core visual component of the chart.

6. X-Axis: Time or Categories

The X-Axis typically represents time or different categories. It sets the stage for what is being measured, and its scale can greatly affect how viewers interpret the chart.

7. Axes Labels

Below the title, the Y-Axis and X-Axis labels clarify which variables are being plotted on the vertical and horizontal axes. These labels provide necessary context for interpreting the data.

8. Grid Lines

Grid lines can be added to the chart to help viewers pinpoint the values of each data point accurately. However, they should be used sparingly to avoid cluttering the visual space.

Related: 10 Types Of Data Visualizations To Tell Your Story

What are some best practices for creating effective line charts?

Creating an impactful line chart requires more than just plotting points on a graph. Here are some best practices to ensure your line chart is as effective as possible:

Select appropriate data

Not all data is suited for a line chart. Ensure the data you’re plotting shows a trend over a continuous variable, commonly time.


A cluttered graph can be hard to read. Limit the number of lines on a single chart and use colors and styles that make the lines easily distinguishable.

Use consistent scales

Always use a consistent scale for your Y-axis to avoid misleading your audience. The intervals should be regular and relevant to the data you’re displaying.

Label clearly

Each axis should have a clear, descriptive label, and if you’re using multiple lines, a legend is essential for clarification.

Opt for readability

Use grid lines and markers sparingly to aid in readability without cluttering the chart.

Provide context

A line chart should tell a story. Use titles and captions to provide context to the viewer.

Preview and revise

Before publishing, preview the chart to ensure it accurately conveys the intended message and don’t hesitate to revise as needed.

Thanksgiving Stats

What are the advantages of using a line chart over other types of charts?

You might wonder why line charts are so prevalent and how they stand out in a sea of various other chart types. Here are some of the unique advantages that line charts offer, making them a preferred choice for many data visualization needs.

  • Trend identification: Line charts excel at showing trends over time, which can be harder to discern in other types of charts like pie or bar charts.
  • Simplicity and clarity: Line charts are easy to understand, making them universally useful for a wide variety of audiences.
  • Multiple data series: While bar and column charts can also represent multiple data series, line charts can display more variables on the same axis, making them more compact and easier to read for complex data sets.
  • Predictive analysis: The nature of a line chart makes it easier to extend lines beyond existing data, aiding in forecasting and predictive analysis.
  •  Flexibility: Line charts can be easily transformed into area charts or stepped line charts for different emphases, without requiring a complete redesign.

Smooth Line Chart Template

What are some common mistakes to avoid when creating line charts?

Even something as simple as a line chart can go horribly wrong if not executed correctly. To save you from the pitfalls that could compromise the integrity of your data representation, here are some common mistakes to avoid when crafting your line charts.

  1. Inconsistent axis scale: Using an inconsistent or misleading scale can distort the data and mislead your audience.
  2. Too much clutter: Overloading a single chart with too many lines or data points can make it unreadable.
  3. Lack of labels: Failing to properly label axes, data points or lines can make even a well-designed chart confusing.
  4. Inappropriate data: Using a line chart for data types better suited for other kinds of charts, like nominal data, is misleading.
  5. Ignoring context: Not providing enough contextual information in the form of titles, captions or legends can make the chart hard to interpret.

Line chart examples FAQs

What are the 3 different types of line charts?

The three primary types of line charts are:

  1. Simple line chart: This shows a single series of data, making it ideal for tracking changes over time for a single variable.
  2. Multiple line chart: This displays more than one data series, making it useful for comparing different variables or categories over time.
  3. Compound line chart: This is a variation of the multiple line chart but takes it a step further by adding the dimension of depth or area shading between lines.

What are the differences between a line graph and a scatter plot?

While both line graphs and scatter plots can represent relationships between variables, they serve different purposes:

  1. Line graph: Primarily used for showing trends over time, line graphs connect data points with lines to show fluctuations, upswings or downswings.
  2. Scatter plot: Used mainly for showing the relationship between two different variables, scatter plots display dots without connecting lines, helping to identify correlations or patterns.

What types of data are best suited for line charts?

Line charts are most effective for visualizing data that has a logical sequence or shows a trend over time, such as stock prices, temperature over a year or monthly sales figures. They are less suitable for nominal or categorical data without an inherent order.

Are there online tools for creating line charts without excel or other software?

Yes, there are several online platforms, like Venngage Chart Maker, Google Sheets and various data visualization tools, that allow you to create line charts without the need for Excel or specialized software. These platforms offer templates and easy-to-use interfaces for quick chart creation.

Can line charts be used for qualitative data, or are they mainly for quantitative data?

Line charts are generally more suited for quantitative data that can be measured on a consistent scale. 

Related: How to Choose the Best Types of Charts For Your Data

What is the difference between line graph and line chart?

The terms “line graph” and “line chart” are often used interchangeably and essentially refer to the same thing: a graphical representation used to show the relationship between two types of information by using a line to connect data points on a grid.

What is the difference between a plot and a chart?

While both plots and charts are graphical representations of data, they differ in their complexity and purpose:

  1. Plot: Usually refers to a more scientific or technical representation, often used in mathematics and sciences to display precise relationships between variables.
  2. Chart: A broader term that can include plots but is generally less technical, used in various fields like business and social sciences to summarize data and show trends.

Both can be highly effective in conveying information, but the choice between the two often depends on the audience and the level of detail required.

Related: 11 Types of Charts and How Businesses Use Them

Final thoughts

In the complex world of data, line charts serve as an indispensable tool for transforming raw numbers into insightful visual narratives. 

And it’s not just about creating these charts; knowing how to interpret them effectively can offer valuable insights for business, research and personal understanding.

Don’t miss out on Venngage’s Line Graph Maker and a curated collection of pre-made templates. Designed to make data visualization accessible and efficient, Venngage takes the complexity out of the equation, so you can focus on what truly matters—telling your data’s story in the most compelling way.