Y gets scaled down by a factor of 2 you divide it by 2 now notice the difference? here however we scale X, we sacled up Y by the same amount now if we scale up X by a factor when we have inverse variation, we are scaling down Y by the same so that's were the inverse is coming from and we could go the other way id we made X is equal to 1/2 so if we were to scale down X, we are going to see that this is going to scale up Y