And I encourage you to pause this video, and especially if you've seen the other videos on introducing the idea of the average value of a function, figure out what this is. What is the average value of our function f over this interval? So I'm assuming you've had a go at it. Let's just visualize what's going on, and then we can actually find the average. So that's my y-axis. This is my x-axis. Now over the interval between zero and three, so let's say that this is zero.