Given Sxx=40,Syy=90S_{xx} = 40, S_{yy} = 90Sxx=40,Syy=90, and Sxy=30S_{xy} = 30Sxy=30, what is the coefficient of determination R2R^2R2?
0.250.250.25
0.330.330.33
0.500.500.50
0.750.750.75