I hand drew this. It's closer to about right over there on our diagram. And actually that looks pretty, pretty close. That actually looks pretty good. I just hand drew this curve, so it's definitely not exact. But anyway, hopefully that gives you a sense of what's going on here. We're just saying, hey, the mean value theorem gives us some c where the slope of the tangent line is the same as the slope of the line that connects three, one f of one and three f of three.