1. XYZ cars is interested in modeling the relationship between the number of cars sold each month and the number of sales persons who work on the showroom. The data are summarized below. Sales People on Duty ( x) Number of Cars (Y) 6 42 33 10 20 28 20 40 45 36 45 41 27 a. Construct a scatter diagram. b. Find the equation of the best fitting line y = a + bx. C. Find the coefficient of correlation. 9. Predict the number of cars to be sold if the number of people on duty are 12, 15, 20 and 22