In this lesson, you'll learn about relations and functions and the various ways they can be expressed, such as through tables, graphs, and ordered pairs. The domain and range of a relation are defined as the set of inputs and outputs, respectively. Additionally, you'll learn about the basics of a function, where each input always produces exactly one output. This video is a great place to start if you're new to the topic of relations and functions.
Definition of Relation and Function, and ways to express them.
More free YouTube videos by Julie Harland are organized at http://yourmathgal.com