1. The problem statement, all variables and given/known data This is how my problem has been presented: The position of a rabbit along a straight tunnel as a function of time is plotted in Fig. 2-26. http://img134.imageshack.us/img134/8263/graphxt5.th.jpg [Broken]http://g.imageshack.us/thpix.php [Broken] Determine its instantaneous velocity at the following times. (b) t = 32.5 s 2. The attempt at a solution Attempts are: 0.49231 m/s 0.50769 m/s 0.523077 m/s 0.53846 m/s 0.553846 m/s 0.56923 m/s 0.57085 m/s 0.5846 m/s The numbers are obtained, though rounded, for x/32.5 s, where x is, and in order: 16 16.5 17 17.5 18 18.5 18.552625 (obtained by count pixels and some math to get a number, though it failed) 19 The problem is probably just because the graph is terrible for this kind of work, due to the fact that the graph came off some different problem that was intended for students to describe the graph, so the numbers aren't very well set. These are the numbers I obtained off the few weeks of physics I had but any other input is fine. Its also fine to give a guess off the top of your head, so i can try it, but please base it off something.