4. A college admissions officer claims that the prediction equation = .5+7.0X approxi- mates the relationship between Y = college GPA and X = high school GPA (both mcas- ured on a four-point scale) for students at that college.

a) Is this equation realistic? Why or why not

b) Suppose that the prediction equation is actually .5+.7X Interpret the slope.

c) Using the prediction equation in (b). find the predicted GPA for a student having a lugh school GPA of (i) 3.0. (ii) 40

d) Suppose the prediction equation is = X. Identify the y-intercept and slope, and interpret the values