And what that is, is you take each of these data points, vertical distance to the line. So this distance squared plus this distance squared plus this distance squared plus this distance squared. That's all we just calculated on Excel. And that total squared variation to the line is 2.74, our total squared error with the line. And then the other number we figured out was the total distance from the mean. So the mean here is y is equal to 1 4th. So that's going to be right over here.