Let's just work through this. What is, we know that velocity as a function of time is going to be the antiderivative of our acceleration as a function of time. Our acceleration is just 1. This is going to be, the antiderivative of this right over here is going to be T, and then we can't forget our constant, plus C. Now we can solve for C because we know V of 3 is negative 3. Let's just write that down. V of 3 is going to be equal to 3, 3 plus C. Every place where I saw the T, or every place where I have the T, I replace it with this 3 right over here. Actually, let me make it a little bit clearer.