This document provides information about functions and relations in mathematics. It contains the following: 1) A definition of a relation as a set of related information with two types of data that can be graphed on a coordinate plane. 2) An explanation that functions are "well-behaved" relations where each x-value relates to only one y-value. 3) An example of a relation that is a function because each number in the x column corresponds to only one number in the y column.