# Functions: onto, one to one, domain, range

Taught by mrbrianmclogan
• Currently 4.0/5 Stars.
6767 views | 1 rating
Part of video series
Meets NCTM Standards:
Lesson Summary:

This lesson teaches you how to determine if a set of points is a function or not using function notation. You can determine if it is a function if each element in the domain maps to exactly one element in the range. The video also covers onto and one-to-one functions and how to determine if a set of points falls into these categories.

Lesson Description:

In this video I show you how to determine if a set of points is a function or not

I show how to solve math problems online during live instruction in class. This is my way of providing free tutoring for the students in my class and for students anywhere in the world. Every video is a short clip that shows exactly how to solve math problems step by step. The problems are done in real time and in front of a regular classroom. These videos are intended to help you learn how to solve math problems, review how to solve a math problems, study for a test, or finish your homework. I post all of my videos on YouTube, but if you are looking for other ways to interact with me and my videos you can follow me on the following pages through My Blog, Twitter, or Facebook.

Questions answered by this video:
• What is function notation?
• How do you know if a set of points is a function?
• How do you find the domain and range of a function?
• How do you find the domain and range of a set of points?
• What is the domain and range of (-2, 2), (2, 4), (3, 8), and (4, 4)?
• When is a set of points not a function?
• What does it mean for a function to be onto?
• How do you know if a function is one-to-one?
• #### Staff Review

• Currently 4.0/5 Stars.
This lesson shows an example of a list of ordered pairs and explains whether the relation is a function, what its domain and range are, and whether it is onto or one-to-one. All parts of this lesson are explained clearly.