Amanager was attempting to predict store coat sales using the number of customers entering the store. the following data was collected: mean coat sales $350, standard deviation of sales $50, mean number of customers 120 and standard deviation of the number of customers 40. the correlation between the number of customers and coat sales is 0.6. the best fit least squares regression line is:

a. sales = a x + b %3d
b. sales = 260 + 0.75 x number of customers
c. sales = 442 + 0.9 x number of customers
d. no answer is correct.
e. sales = 514 + 0.3 x number of customers