Are all relations functions? Are all functions relations? There is a difference between these two terms. We will differentiate their meaning, as well as talk about domain, range, independent variable, dependent variable and the vertical line test for a function.

If you are need a refresher on functions, you can check out the lesson at What is a Function?

In this lesson, the assumption is that there is an understanding of domain and range. If a refresher is required, you can check out Domain and Range.