Chapter 11.9, Problem 2E

Refer to Exercise 11.1.

1. a. Plot the equation $\hat{y}=.51+1.38x$ in the scatterplot produced in Exercise 11.1. Comment on how close this line is to the line you fitted through the points.
2. b. Use the equation $\hat{y}=.51+1.38x$ to predict y for x = 20.

11.1 Plot the data shown here in a scatterplot, and sketch a line through the points.