And of course you could always graph a function just by trying out a bunch of points. But we want to really focus on the points that are interesting to us and then just to get the general shape of the function, especially we want to focus on the things that we can take out from this function using our calculus toolkit or our derivative toolkit. So the first thing we probably want to do is figure out the critical points. We want to figure out, I'll write it here, critical points. And just as a refresher of what critical points means, it's the points where the derivative of f of x is 0. So critical points are f prime of x is either equal to 0 or it's undefined. This function looks differentiable everywhere, so the critical points that we're worried about are probably, well I can tell you, they're definitely just the points where f prime of x is going to be equal to 0.