Exam style questions - Hodder Plus Home

a Complete the scatter diagram. (The first 5 points have been plotted for you.) [2]
13
Weekly admissions (thousands)
12
11
10
9
8
7
10 12 14 16 18 20 22
Number of screens
b Describe the correlation shown in the scatter diagram [1]
c Draw a line of best fit. [1]
d A new cinema is to be built in another town. It is to have 17 screens.
Estimate the weekly audience. [1]
3 The table shows the daily audiences for three weeks at a cinema.
Mon Tue Wed Thu Fri Sat
Week 1 268 325 331 456 600 570
Week 2 287 359 391 502 600 600
Week 3 246 310 332 495 565 582
a Plot these figures in a graph. Use a scale of 1 cm to each day on the horizontal axis and 2 cm to 100
people on the vertical axis. You will need to have your graph paper ‘long ways’. [3]
b Comment on the general trend and the daily variation. [2]
4 An orchard contains nine young apple trees. The table shows the height of each tree and the number of
apples on each.
Height (m) 1.5 1.9 1.6 2.2 2.1 1.3 2.6 2.1 1.4
Number of apples 12 15 20 17 20 8 26 22 10
a Draw a scatter graph to illustrate this information. Use a scale of 2 cm to 1 m on the horizontal axis and
2 cm to 10 apples on the vertical axis. [4]
b Comment briefly on the relationship between the height of the trees and the number of apples on
the trees. [1]
c Add a line of best fit to your scatter graph. [1]
d Explain why it is not reasonable to use this line to estimate the number of apples on a tree of similar type
but of height 4 m. [1]
© Hodder Education 2011 Unit B
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