Lesson 9, Topic 6
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# Pie Chart

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#### Topic Content:

• Meaning of Pie Chart
• Interpreting Pie Chart

Pie charts are used to display data in a circle to show how things are divided into sectors. Pie charts are widely used in advertising and in the business world because they are very easy to understand.

### Example 9.6.2:

At a restaurant, a refrigerator is emptied every day in order to clean it. The table below shows the number of each type of drink in the refrigerator on a certain day.

(a) Draw a pie chart to show the information
(b) What percentage of the drinks was fanta?

Solution

(a) Total number of drinks = 15 + 12 + 8 + 6 + 9

∴ Total number of drinks = 50

There are 360° (degrees) in a circle, so you need to find the fraction of 360° in each case.

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