1. The problem statement, all variables and given/known data This is an experiment involving colliding 2 gliders on an airtrack. Initial and final speeds are both recorded. I need to plot a graph that proves the Conservation of Momentum holds true, but I can't seem to get the correct Y and X axis variables. Assuming both masses m1 and m2 are known, how do I go about doing this? 2. Relevant equations m1v1i + m2v2i = m1v1f + m2v2f 3. The attempt at a solution This only thing I can think of is manipulating the equation so it looks like: v2f = (m1/m2)(v1i - v1f) + v2i Thus I'll be taking v2f as my Y-axis, v1i - v1f as my X-axis. However, my constant is the variable v2i, so this model will probably not work... I'd appreciate all the help given, and thanks.