So if you have a curve that looks something like this, if you have a curve that looks something like this, you'll notice that over here the slope is negative, but it's increasing. It's getting less negative, less negative, then it goes to zero, then it keeps increasing. Slope is increasing, increasing, all the way to there, and then it starts getting less positive. So it starts decreasing. So it's increasing, the slope is increasing over this point right over here. So even though the slope is negative, it's getting less negative over here, so it's increasing. And then the slope keeps increasing, gets to getting more and more positive up to about this point, and then the slope is positive, but then it becomes less positive.