Answer it correctly please. I ll rate accordingly. Ty-ped answer only and explain well.

The Pearson correlation between X, and Y is r = 0.70. When a second variable, X2, is added to the regression equation, we obtain R2 = 0.49. How much variance for the Y scores is predicted by using only X1 as a predictor variable? O 0.15 or 15% O 0.06 or 6% O 0.70 or 70% O 0.49 or 49%