So let's think about what's happening in this first region, this part of the curve up here where it looks like a arc, where it's opening downward, where it looks like an A without the cross beam or an upside down U. And then we'll think about what's happening in this upward opening U part of the curve. So over this first interval right over here, if we start over here, the slope is very positive. Slope is very positive. Then it becomes less positive. Then it becomes even less positive. It eventually gets to 0.