Listed below is the multiple regression equation for predicting Y by X1 through X4. Y = College GPA X1= High School GPA X2= SAT math score X3= Sat Reading score X4= Number of extracurricular activities There are a total of n=28 observations used in the analysis. + 0.0006 +0.0007 - 0.0071 Y-hat = 3.5 -0.08X1 X2 X3 XA R- square 0.39