And so if we want to estimate the slope of the tangent line, if we want to estimate the steepness of this curve, we could try to draw a line that is tangent right at that point. And so let me see if I can do that. So if I were to draw a line starting there, if I just wanted to make it tangent, it looks like it would do something like that, that right at that point, that looks to be about how steep that curve is. Now what makes this an interesting thing in nonlinear is that it's constantly changing. The steepness, it's very low here, and it gets steeper and steeper and steeper as we move to the right for larger and larger x values. But if we look at the point in question, when x is equal to five, remember, f prime of five would be, if we were estimating it, this would be the slope of this line here. And the slope of this line, it looks like for every time we move one in the x direction, we're moving two in the y direction.