How can I prove that COVAR(x,y)/VAR(x) = b? I'm pretty sure the first part equals m, but I don't see how the slope and y-intercept can be the same thing, unless their both zero.
Any nudge in the right direction would be greatly appreciated.
How can I prove that COVAR(x,y)/VAR(x) = b? I'm pretty sure the first part equals m, but I don't see how the slope and y-intercept can be the same thing, unless their both zero.
Any nudge in the right direction would be greatly appreciated.