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When you have categorical (also known as nominal) data (e.g., hometown, favourite colour, etc.), you should use a bar chart.

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You have collected some categorical data. What type of graph should you use to display this data?

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Bar chart

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Scatter graph

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Line graph

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Data type for bar charts

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When you have data that changes over time, you should use a scatter graph.

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You have collected some data that changes over time. What type of graph should you use to display this data?

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Line graph

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Bar chart

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Scatter graph

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Data type for line graph

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When you have continuous (also known as scale) data (e.g., height, volume, etc.), you should use a scatter graph.

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You have collected some continuous data. What type of graph should you use to display this data?

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Scatter graph

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Bar chart

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Line graph

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