How do you think these two things should relate? And I encourage you to look at all of this to come to that conclusion, and pause the video to do so. Well, let's just think about what's going to happen. This is going to be, if I were to literally just take this, if I were to literally just take this and copy and paste it, which is exactly what I'm going to do, if I just took this, by definition, since I swapped these two bounds, I am going to want to swap these two. Instead of b minus a, it's going to be a minus b now. It's going to be, it's going to be a minus b. So each of these are going, this value right over here, let me make these color-coded maybe, so this orange delta x, this orange delta x is going to be the negative of this green, of this green delta x.