How do you find the rate of a particle that travels along a polar graph? I know that the slope of a polar graph is found through parametrics (and in some case in a rectagular form) adjusted into dy/dx. But the "rate" wouldn't make sense. For example, at a location where the slope is exactly vertical, you find the slope (aka rate) of the particle. The slope, of course, is infinite. But does that also mean that the particle's rate is infinite? If so, then the particle should basically jump off the polar graph but its distance from the origin is barely changing. What's up? Am I missing something?