Today in Grad Stats II we were talking about linear regression equations, which sounds scary but is actually just a fancy name for a procedure that allows you to predict one thing on the basis of another thing (e.g., predicting a person's height based on her weight)." Simple, right?

In the course of lecture, my professor passed out this handout (click it to enlarge).

He said, I kid you not, "This should make things a little more clear."