Here's the deal, you'll probably want to keep taking mathematics upto calculus I, II, and even differential equations, and then Statistics.
It's imperative for physicians, and even as a pre-med taking the MCAT, to have knowledge of how to read a graph, and to spatially analyze of how things change with respect to time. Many concepts of physics are based on this, and chemical kinetics are as well. Those math classes simply burn it into your memory through repetitive problem solving, and even years later if you forget the specifics, you'll be able to recognize easily how to read a graph, understand rates of changes, statistical graphs, etc.
good luck