So I have an exam in a couple hours and this is on the review. This was never covered in class or through the homework (it was optional, I tried to figure it out then but couldn't).
Anyone know how to do this? From reading the book as far as I can tell it should be:
which would be
(25*-2*(25))/(2500-(25)^2) = -0.666666667
But that is apparently wrong. I also don't know how to do the last part of the problem.