Well, a couple of ways to think about it. Slope is equal to rise over run. You might have seen that when you first learned algebra. Or another way of writing it, it's change in y over change in x. So let's figure out what the change in y over the change in x is for this particular case. So the change in y is equal to what? Well, you can take this guy as being the first point or that guy as being the first point.