Interpreting position time graphs - US Physics

The video is about position time graphs and their relation to velocity and acceleration time graphs. It is meant for regular or honors physics as an addition to one dimensional motion. Generally it is in chapter 2 of a physics text.
Small mistake - about half way through I mention slope is delta x over delta y. I meant delta x over delta t, but on a general graph slope is change in y over change in x. All the other references to slope are correct.