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Look at the following circle graph
(pie chart). It shows the favourite
sports of various students.
• The biggest portion shows
that the most students like
cricket.

• Football and athletics are
liked by almost the same
number of students.
• Formula 1 is liked by fewer
students and wrestling is
liked by the least number of
students.

Example. The following data shows the number of students who gave responses

about their favourite pizza toppings.
Toppings Cheese Tomato Onion Capsicum Olive

Number of students 12 3 3 6 24

Represent the data in a circle graph.

Solution. The total number of students is 48. To show the data in the circle graph, fol-
low these steps.

Step 1. Find the fraction of students that like each topping as given in the following

table.

Topping Cheese Tomato Onion Capsicum Olive

Number of Students 12 3 3 6 24

Fraction 12 1 3 1 3 1 6 1 24 1

48 = 4 48 = 16 48 = 16 48 = 8 48 = 2

Step 2. Draw a circle with a suitable radius and colour it

according to the fractions:
1
For , colour one-fourth of the circle red.
4
1
For , colour one-sixteenth of the circle blue.
16
1
For the other , colour one-sixteenth of the circle yellow.
16

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Data Handling