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Maths

Pie charts and frequency diagrams

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Once you have collected your raw data, you need to represent it in a diagram. Two ways of doing this are to use a pie chart or frequency diagram.

Pie charts and frequency diagrams

In a survey, 100 school students were asked to name their favourite soap opera. The results are shown in a pie chart and a frequency diagram below.

image: bar graph

In another school, Emmerdale was the most popular soap:

image: bar graph

Remember: the larger the number, the larger the angle in the pie chart.

Pictograms

A pictogram uses symbols to represent frequency.

This pictogram shows the favourite comedy game show from a survey of 60 students.

Favourite comedy game show

ShowCount
Have I Got News for You
Mock The Week
QI
Other

= 4 people

For the show Have I Got News for You, 3 smiley faces mean this is the favourite for 12 students, as 3 x 4 = 12.

For QI there are 31/2 smiley faces. 1/2 is equal to 2 students, so in total 14 students rate QI as their favourite.

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