Or I should say the speed function. We don't know the actual speed function. So this is the absolute value of v of t, which is the speed function, you could say. Speed, speed function. And so if we wanted to actually integrate it, so if we wanted to integrate it, well, we don't know how to do it if we don't know, we don't know how to do it exactly without knowing the exact function. But we can approximate what the integral is going to be with a right Riemann sum. And a Riemann sum is just breaking up this area into rectangles and then finding the total area of those rectangles.