I would probably wrote something of this sort =====> Matt Skateboarded from his home, Gradually Building Up speed. Matt Slowed down to avoid, some rough ground, but then Matt Speeded up again.
<u>The slope gets Steeper with Time. This means the objects velocity is Increasing. (The Increasing Displacement means it's going away from you).</u>
I would say something along these lines: You are walking along a path, and then someone follows you. You then jog a little faster, but the stalker is coming. You then start to run away from the stalker. You realize that you are taking too long, so you jump on a bicycle. The stalker goes in a bicycle, so you jump onto a moving train to get away from him without stopping.