The owner of an indoor attraction records the amount of rainfall (in mm) and the number of visitors each day for a period of time. His results for 10 days are
shown in the scatter graph.
a) Describe the relationship between the
amount of rainfall and the number of visitors.
X
Number of
150
X
SO
b) One data point is an outlier.
Give its coordinates.
[11
c) Use the scatter graph to predict the following.
(i) The number of visitors on a day with rainfall of 3 mm.
(0)
(ii) The amount of rainfall on a day with 300 visitors.
10
d) Explain why the scatter graph should not be used to estimate the number of
visitors on a day with 9 mm of rainfall.
[1]