Consider Bo and B1, the estimators of the intercept and slope parameters, when your independent variable explains none of the variation in your dependent variable (i.e., when R=0). What is Boand when R² =0? 
a) Bo = 0, B=Y 
b) B=B 
c) Bo=Y, B1 = 0 
d) Bo = 0, B1 = 1