The operations manager of a musical instrument distributor feels that demand for bass drums may be related to the number of television appearances by the popular rock group Green Shades during the preceding month. The manager has collected the data shown in the following table:
Demand for Bass Drums Green Shades TV Appearances
33
6 4
7 7
5 6
10 8
8 5
a) Use the least squares regression method to derive a forecasting equation.
b) What is your estimate for bass drum sales if the Green Shades performed on TV nine times last month?