Question 4: A sales manager for an advertising agency believes there is a relationship between the number of contacts that a salesperson makes and the amount of sales dollars earned). Compute the regression coefficients and develop the regression equation from the following data. sales earned $ number of contacts 5.5 22 3.5 15 3.1 12 2.8 12 4.4 25 4.7 20 5.1 33 5.3 42 3.5 41 5.1 17