Question

4. The local ice cream shop keeps track of how much ice cream they sell versus the noon temperature on that day. Here are their figures for 6 days:

X – Temperature °C	Y – Ice cream sales (in $)
14	220
16	320
11	180
15	330
18	400
22	520

a) Draw a scatter plot for the data;   

b) Find the equation of the line of best fit. Draw the line of best fit on the scatter plot diagram. Round off the coefficients to two decimal places;   

c) Find the coefficient of determination. Write a statement of interpretation for it.

Answer 1