So this right over here, this is the derivative of our original blue function. So here we can see the interesting parts. And so notice what's happening. On the derivative, the derivative is decreasing, which means the slope of our tangent line of our original function is decreasing, and we saw that. Notice, while the derivative is decreasing right over here, our slope will be decreasing. Our slope is positive, our slope is positive, but decreasing, then it becomes negative, but decreasing all the way until this point, which is at x equals negative one. So let's do that again.