b. For the given data, compute each of the following: 3? = 17: Ex: Zy= Ex'= Ey' = Exy= c. The equation of the least-squares line: 57=a+bx = d. Graph the least squares line on your scatter diagram (show the points you are plotting here). 2. A marketing analyst is studying the relationship between x = amount spent on television advertising and y = increase in sales. The data are reported in thousands of dollars. The following data represent a random sample from the study. x (advertising) 15 28 19 47 10 92 y (sales increase) 340 260 152 413 130 855 a. Draw a scatter diagram