please help

An article included a summary of findings regarding the use of SAT I scores, SAT II scores, and high school grade point average (GPA) to predict first-year college GPA. The article states that "among these, SAT II scores are the best predictor, explaining 17 percent of the variance in first-year college grades. GPA was second at 15.4 percent, and SAT I was last at 13.2 percent." If the data from this study were used to fit a least squares line with y = first-year college GPA and x = high school GPA, what would the value of 2 have been? -2 %