Chapter 1.3, Problem 22E

Graduate enrollment. Table 13 lists fall graduate enrollment by gender in U.S. degree-granting institutions. The figure contains a scatter plot and regression line for each data set, where $x$ represents years since 1980 and $y$ represents enrollment (in millions).

(A) Interpret the slope of each model.

(B) Use the regression models to predict the male and female graduate enrollments in 2025.

(C) Use the regression models to estimate the first year in which female graduate enrollment

will exceed male graduate enrollment by at least 1 million.