So over here, over here, we see f is increasing, going into the relative maximum point. f is increasing, which means that the derivative of f, the derivative of f must be greater than zero. And then after we pass that maximum point, after we pass that maximum point, we see that our function needs to be decreasing. Let me just add another color. We see that our function is decreasing right over here. So f decreasing, decreasing, which means that f-prime of x needs to be less than zero. So our relative maximum point should be, should happen at an x-value.