And what we want to do is approximate it with a line around that. And what we're essentially going to do is we're going to approximate it with the equation of the tangent line. The tangent line is going to look something, something like that. And as we can see, as we get further and further from x equals negative one, the approximation gets worse and worse. But if we stay around x equals negative one, well, it's a decent, it is as good as you can get for a linear approximation, or at least in this example, it is a very good linear approximation. So when people say, hey, find a linear approximation of f around x equals negative one, or if they say, what is the following is the best approximation, and all of your choices are lines, well, essentially they're asking you to find the equation of the tangent line at x equals negative one. So let's do that.