So that's literally going to be equal to mx1 plus b. That's that first error. We can keep doing it with all of the points. This error right over here is going to be y2 minus mx2 plus b, so y2. And then this right here, this point right here, is mx2 plus b, the value when you take x2 into this line. And then we keep going all the way to our nth point. This error right here is going to be yn minus mxn plus b.