This quick reference info sheet explains the 8th grade concept of functions. It includes:What is a Function?Examples of Different Representations (mappings, context, graphs, equations, and tables) for linear functions, non-linear functions, and non-functions.This can be used for students to review the concept after they've already learned it or as an already complete notes page to help teach the concept. It is also a great resource to give to parents at the beginning of the unit as a way for the