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Data Visualization · Lesson 3 of 6

How to Choose the Right Chart or Graph for Your Data

When you manage several content assets, such as social media or a blog, with many sources of data, it can get overwhelming.

1 Learn the concept

When you manage several content assets, such as social media or a blog, with many sources of data, it can get overwhelming. What should you show, and how? The right chart makes a point obvious, and the wrong one hides it. This lesson shows how to choose a chart by starting with the question you want to answer.

A table matching questions to chart typesQUESTION TO CHARTQuestionChartHow has it changed over time?Line chartHow do categories compare?Bar chartWhat is the share of the whole?Stacked bar, or a pie chart for a few partsHow are two things related?Scatter plotHow is it distributed?Histogram
Choose the chart from the question, not from the tool.

2 See it in action

  • Comparison: use bars to compare categories.
  • Trend: use lines to show change over time.
  • Part of a whole: use a pie or stacked bar, sparingly.
  • Relationship: use a scatter plot to show how two measures relate.

Worked example

Choosing a chart

Question: how did sales change each month this year?

Data: 12 monthly totals.

Chart: a line chart, since it shows a trend over time.

Not: a pie chart, which cannot show change over time.

Check: label the axes and use a clear title.

3 Study an example

Example scenario

A marketer plots monthly traffic as a pie chart and the trend is invisible. Switching to a line chart shows growth at a glance.

4 Apply it and download

  1. Write the question your data should answer.
  2. Choose a chart type for it.
  3. Build it and test it on a colleague.

Worksheet Data cleaning checklist and report templateOpen, print or save as PDF

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