And when x is equal to three, y is equal to three squared, which is equal to nine. And so you can see when x is equal to three, y is equal to nine. And to figure out the average rate of change of y with respect to x, you say okay, well what's my change in x? Well we can see very clearly that our change in x over this interval is equal to positive two. Well what's our change in y over the same interval? Our change in y is equal to, when x went increased by two from one to three, y increases by eight. So it's gonna be a positive eight.