Most of them seem pretty accurate. all though the the last on at top right’s circles when off the graph, which is terribly inaccurate. Although the one that me and my colleague studied was slightly off on axis with the graph squares but besides that it was perfect. The one that me and my colleague created was the one on the bottom. The shape depends on the problem. If it is accelerating then it will probably be curved. If it is steady then it will be a straight graph. For instance, run a little stop, run a little stop, and walk to the end. That will be probably going up steady and then horizontal. Then will go up steady, and then horizontal and then it will slow down which is basically the exact opposite of accelerating but which is still curved.