The Advanced Placement Macroeconomics exam doesn't have quite as many graphs as the Microeconomics exam has, but the few there are always show up in the FRQ's. Except for the business cycle graph, you will need to know how to draw and manipulate them. Make sure you get a good amount of practice drawing these. Make special note of how each curve and axis is labeled. Remember you must always label everything on those FRQ's!
Follow the link below to get a quick review of all seven graphs.