In one dimension, it would just be the absolute value of your velocity function. And so the absolute value of the velocity function, this would give you, integrating the speed, this would give you the distance. Distance from t equals two to t is equal to six. And let's see, we have that choice right over here. The displacement one here, this is an interesting distractor, but that is not going to be the choice. This one right over here, v prime of six, that gives you the acceleration. If you're taking the derivative of the velocity function, the acceleration at six seconds, that's not what we're interested in.