And that idea, the difference between the actual four-point and what would have been predicted given, say, the height, that is called a residual. Let me write that down. The residual for each of these data points. And so, for example, if I call this right here, if I call that 0.1, the residual for 0.1 is going to be, well, for our variable, for our height variable, 60 inches, the actual here is 100 pounds, and from that we would subtract what would be predicted. And so what would be predicted is right over here. I could just substitute 60 into this equation, so it would be m times 60 plus b. So I could write it as m, maybe let me write it this way, 60m plus b.