So when we figure out the error, we're going to figure out the distance between negative 3, that's our y value, between negative 3 and negative 2.19. So let's do that. So the error is just going to be equal to our y value, that cell E2, minus the value that our line would predict. And we want the square. So just that value is the actual error, but we want to square it. So we want to square it just like that. So we will square it.