# Functions

Taught by MrA
• Currently 4.0/5 Stars.
9247 views | 3 ratings
Meets NCTM Standards:
Lesson Description:

What is a function? What are some examples of functions? How do you determine if something is a function? What does that really mean? This lesson will explain in a very practical way what a function is and why it is important to know. Also, an introduction to function notation.

• What is a function?
• What is the definition of a function?
• What are some real-life functions?
• What is a mapping?
• How can you tell if something is a function?
• What is the vertical line test?
• How can you tell if a graph is a function?
• What is function notation?
• How do you use function notation?
• #### Staff Review

• Currently 5.0/5 Stars.
If you're still struggling with how to determine if something is a function, this lesson explains the concept using a very philosophical approach. This lesson really helps you realize what it means for anything to be a function, and gives you several ways to test or check to determine if something is a function. The resources that go along with it just make this lesson stronger and more helpful.
• #### wjpolkster

• Currently 5.0/5 Stars.
Great explanation to elementary functions
• #### KMMath

• Currently 3.0/5 Stars.
This video was pretty good. It explains functions pretty well.