And so right here, we're slightly negative, and then we become very negative. And so maybe this is, let's call, let's call this F, and maybe this is F prime. This is F prime right over here. And now let's look at this middle graph. What would its derivative do? So over here, our slope is slightly negative, and then it becomes more and more and more and more and more negative. And so the derivative of this might look like it has to be slightly negative, but then it gets more and more and more and more negative as we approach that vertical asymptote.