Then this would be the point x comma f of x. And then we could take some x plus h. So let's say that this right over here is the point x plus h. And so this point would be x plus h f of x plus h. We can find the slope of the secant line that goes between these two points. So that would be your change in your vertical. Which would be f of x plus h minus f of x over the change in the horizontal. Which would be x plus h minus x. And these two x's cancel. So this would be the slope of this secant line.