Question: 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:
(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 Green Shades performed on TV four times last month?