They look like a little lump like that. They could also actually look like that, but since this is a differentiable function over the interval, we're probably not dealing with a relative maximum that looks like that. And so what do we know about a relative maximum point? So let's say, let's say that's our relative maximum. Well, as we approach our relative maximum for values for, as we have x-values that are approaching the x-value of our relative maximum point, as we approach it from values below that x-value, we see that we have a positive slope. Our function needs to be increasing. So over here, over here, we see f is increasing, going into the relative maximum point.