This is an actual question from a past AP calculus exam. All right, now let's do this together. And if I was actually doing this on exam, I would just cut to the chase and I would figure out the equation of the tangent line at x equals two, go through the point two comma one, and then I would figure out, okay, when x is equal to 1.9, what is the value of y? And that would be my approximation. But for the sake of learning and getting the intuition here, let's just make sure we understand what's happening. So let me graph this. So let's say that's my y-axis, and then this is my x-axis, and this is x equals one, this is x equals two, this is y equals one.