9. Given the set of paired X and Y scores,

X 7 10 9 13 7 11 13

Y 1 2 4 3 3 4 5

x	y	Xy	X2
7	1	7	49
10	2	20	100
9	4	36	81
13	3	39	169
7	3	21	49
11	4	44	121
13	5	65	169
Totals 70	22	232	738

a.Construct a scatter plot of the paired scores. Does the relationship appear linear?

b. Determine the least-squares regression line for predicting Y given X.

c. Draw the regression line on the scatter plot.

d. Using the relationship between X and Y, what value would you predict for Y if X _ 12? (Round to two decimal places.)