Internet and email use According to data selected from GSS in 2014, the correlation between y = email hours per week and x = Internet hours per week is 0.33. The regression equation is predicted email hours = 3.54 + 0.25 Internet hours

a. Based on the correlation value, the slope had to be positive. Why?

b. Your friend says she spends 60 hours on the Internet and 10 hours on email in a week. Find her predicted email use based on the regression equation.

c. Find her residual. Interpret.