It's going to give you an x value. But then you have to add another 2 to go all the way over here. So your entire radius is a function of y. Your radius as a function of y is going to be equal to the square root of y plus 1. This essentially will give you one of these x values when you're sitting on this curve. So x as a function of y will give you one of these x values. And then from that, you add another 2.