Overview of functions

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Taught by mrbrianmclogan
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Lesson Summary:

In this lesson on the overview of functions, we learn that functions are a relationship or a relation between two sets. We also learn about input and output variables, domain and range, and implied domain. The importance of a unique relationship between input and output variables in a function is stressed, and we see how to identify whether or not a relationship is a function. Ultimately, we explore the significance of giving a function a name with the most common one being f, and how to evaluate a function at a numeric value.

Lesson Description:

What are functions -- function overview

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Questions answered by this video:
  • What does it mean when we say a relation is a function?
  • What is the domain of a function?
  • What is the range of a funtion?
  • How do you evaluate a function at a specific value?
  • Staff Review

    • Currently 5.0/5 Stars.
    This video is an overview of functions. The instructor explains what is means for the domain (input values) and range (output values) to have a relationship that is a function. He also explains how to write function notation and how to evaluate a function at a specific value.