Howard Weiss, owner of a musical instrument distrib- utorship, thinks that demand for bass drums may be related to the number of television appearances by the popular group Stone Temple Pilots during the previous month. Weiss has collected the data shown in the following table: Demand for Bass Drums 3 6 7 5 10 7 Stone Temple Pilots' 3 4 7 6 8 5 TV Appearances

a) Graph these data to see whether a linear equation might describe the relationship between the group's television shows and bass drum sales.

b) Use the least-squares regression method to derive a forecasting equation.

c) What is your estimate for bass drum sales if the Stone Temple Pilots performed on TV nine times last month?

d) What are the correlation coefficient () and the coefficient of determination (2) for this model, and what do they mean? P