Page 187 - Mathematics Coursebook

19.2 Interpreting and drawing pie charts

2 The pie chart shows the number of emails Preety received in Emails received in one week
one week. Monday
a On which day did she receive the most emails? Tuesday
b On which day did she receive the fewest emails? Wednesday
c On which two days did she receive the same number Thursday
of emails?
d Can you tell from the pie chart how many emails Preety Friday
received on Friday? Explain your answer.

3 The table shows the number of different makes of car in a car park. Make of car Frequency
a Copy and complete Anna’s calculations below to work out the Ford 12
number of degrees for each sector of a pie chart to show this Vauxhall 18
information.
Toyota 10
Nissan 20
Total number of cars = 12 + 18 + 10 + 20 = cars
Number of degrees per car = 360 ÷ = °
Number of degrees for each sector:
Ford = 12 × ° = ° Vauxhall = 18 × ° = °
Toyota = 10 × ° = ° Nissan = 20 × ° = °

b Draw a pie chart to show the information in the table.

4 A group of 40 people were asked which type of music they prefer. Remember to label each sector
The table shows the results. and give the pie chart a title.
Type of music Frequency
Soul 5
Classical 20
Pop 8
Other 7
Draw a pie chart to show the information in the table.

5 Alexi has worked out the number of degrees for each sector of a pie chart, but he has spilt coffee on
the table showing his results!
This is what his table looks like now.

Favourite type of fi lm Frequency Number of degrees

Action 2 40

Romantic 7

Science fiction 80
Comedy 100

a Work out the missing entries in his table.
b Draw a pie chart to show the information in the table.

186 19 Interpreting and discussing results