What I want to do is I want to find, and that's what the topic of the next few videos are going to be, I want to find an m and a b. So I want to find these two things that define this line so that it minimizes the squared error. So let me define what the error even is. So for each of these points, the error between it and the line is the vertical distance. So this right here we can call error 1. And then this right here would be error 2. It would be the vertical distance between that point and the line.