OK, on a velocity-time graph, how does one determine the acceleration? I actually attempted to find the slope of the line and the graph here: http://www.physicsclassroom.com/Class/1DKin/U1L4a.cfm (the second graph with the rightward changing velocity) Why does it graph 4, 8, 12, 16 and 20 instead of the 2, 8, 18, 32 and 50 on the velocity axis? If I find the slope of the line I get 2, 4, 6, 8, 10 which to me looks like constant acceleration and not rightward changing acceleration. Can anybody help me? Thanks for the help.