Sections:

Watch: Video Lesson

Watch: Practice Set

Watch: Test Solutions

# Function Definition

About:

Additional Resources:

In this section, we cover the Function Definition. What is a Function? To think about the definition of a function, we begin by learning the definition of a relation. A relation is simply any set of ordered pairs. When a relation satisfies a certain criteria, it is known as a function. All functions are relations, but not all relations are functions. In order to have a function, each x-value or member of the domain has to correspond or be linked to exactly one y-value or member of the range. As an example, suppose we looked at the following relation:

{(0,3), (2,5), (6,11)}

In this example, each x-value corresponds to exactly one y-value and we can say this relation represents a function.

{(0,3), (2,5), (6,11)}

In this example, each x-value corresponds to exactly one y-value and we can say this relation represents a function.

Function Definition Resources:

Videos:

Khan Academy - Video Virtual Nerd - Video Khan Academy - Video Text Lessons:

Math is Fun - Text Lesson Lamar EDU - Text Lesson Chili Math - Text Lesson Worksheets:

Math Warehouse - Worksheet Khan Academy - Practice Khan Academy - Practice + Show More +