​When to use a bar graph?

• A bar graph is a graph that uses ​bars of different lengths to compare data.

• The graph compares ​different categories

• The graph shows how many are in each category.

​Rules for a bar chart

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1. Title of chart

2. Labels on axes

3. Frequency on vertical axes

​4. Right scales

5. Space between bars

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​Data will be given by category and frequency

• ​Categories: Flavours of ice cream, Types of flowers, Favourite pets, colours of cars...

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• Frequency: ​Number sold, Number of pupils, Number of pets...

​Reading Bar Graph

• Look for the category​ and read off the numbers on the vertical axis which is at the same height as that bar.