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Maths Exercices

Interpret bar graphs

Bar graphs (charts) are a type of graph that are used to display and compare the number, frequency or other measure for different discrete categories of data.

The x-axis represents the different categories and so has no scale. In order to emphasise the fact that the categories are discrete, a gap is left between the bars on the x-axis. The y-axis does have a scale and this indicates the units of measurement.  

Mrs. Hall asked her students what kind of pet they have.

How many students have a pet bird? 2 students have a pet bird.

This bar graph shows the number of hours Peter spent watching T.V. each week.

In which week did Peter watch the least T.V.?

Week 1
Week 2
Week 3
Week 4
Week 5