Now let's do the alternate definition. The alternate definition, if you don't want to find a general derivative expressed as a function of x like this, and you just want to find the slope at a particular point, the alternate definition kind of just gets straight to the point there. So what they say is, hey, look, let's imagine some other x value here. So let's imagine some other x value. This right over here is the point x, well, we could say f of x or we could even say the natural log of x. What is the slope of the secant line between those two points? Well, it's going to be your change in y values, so it's going to be natural log of x minus 1 over your change in x values.