So on this side, the derivative starts out super negative, and then it looks like it is, the derivative is going to asymptote towards zero, something like that. So based on what we just, it actually looks like, so based on what I just sketched, it just looks like this right graph is a good candidate for the derivative of this left graph. You might say, what's wrong with this blue graph? Well, this blue graph out here, notice it's positive. So if this were the derivative of the left graph, then that means that the left graph would need a positive slope out here, but it doesn't have a positive slope. It's a slightly negative slope becoming super negative. And so right here, we're slightly negative, and then we become very negative.