The admissions officer for Clearwater College developed the following estimated regression equation relating the final college GPA to the student’s SAT mathematics score and high-school GPA. y​=−1.41+.0235x_1​+.00486x_2​

where

x1= high-school grade point average  x2= SAT mathematics score  y= final college grade point average 

Required:
a. Interpret the coefficients in this estimated regression equation.
b. Estimate the final college GPA for a student who has a high-school average of 84 and a score of 540 on the SAT mathematics test.