# Relations and Functions 1

Taught by YourMathGal
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Lesson Summary:

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.

Lesson Description:

Definition of Relation and Function, and ways to express them.

More free YouTube videos by Julie Harland are organized at http://yourmathgal.com

• What is a relation?
• What are some representations of relations?
• How do you draw a picture of a relation with inputs and outputs?
• How do you write a relation as a set of ordered pairs?
• How can you make a table of values for a relation?
• How can you describe a relation in words?
• How can you make a graph for the values of a relation?
• What is the domain and what is the range of a relation?
• How do you state the domain and range of a relation?
• What is the domain and range of a graph with ordered pairs?
• What is a function?
• #### Staff Review

• Currently 4.0/5 Stars.
This lesson is a very basic introduction to relations. The purpose of this lesson is to show you what a relation is, show several methods of representing a relation, and explain some characteristics of a relation. These concepts will be used in the coming videos to explain when a relation is a function. First, however, the basics must be learned in this video. At the end of this lesson, a function is introduced.