Researchers at Tuskegee University and university of Florida used simple Linear regression to predict undergraduate grade point averages (GPA) using ACT scores. The regression equation they obtained was: GPA = 1.977+0.044*(ACT score) Use this information to answer the parts that follow. Part 1: interpret the slope of the regression line. A. If a students ACT score increases by 1, the students GPA on average increases by 1.977 B. If a students GPA increases by 1, the students ACT score on average increases by 0.044 C. If the students ACT score increases by 1, the students GPA on average increases by 0.044 D. If a students ACT score is zero, their GPA would be 0.044 Part 2: if a particular student in their study had a residual of -0.35, what does this mean? A. The students actual GPA score was 0.35 standard deviation away from their predicted GPA B. The students actual GPA was 0.35 points higher than their predicted GPA C. The students actual GPA was 0.35 points lower than their predicted GPA D. The students actual ACT score was 0.35 points lower than their predicted ACT score