What's a Function?

What's a Function?

Note:

You can't go through algebra without learning about functions. This tutorial shows you a great approach to thinking about functions! Learn the definition of a function and see the different ways functions can be represented. Take a look!

Keywords:

  • definition
  • function
  • input
  • output
  • x-value
  • y-value
  • relation
  • domain
  • range
  • ordered pairs
  • graph
  • function rule
  • table
  • mapping diagram
  • operation
  • operations
  • ordered pair

Background Tutorials

  • Evaluate functions, expressed in function notation, given one or more elements in their domains

      • What is Function Notation?What is Function Notation?

      What is Function Notation?

      Every see 'f(x)' in your math? That's function notation! It's a way to indicate that an equation is a function. Learn about function notation by watching this tutorial.

  • Graph the functions f(x)=?x, f(x)=1/x, f(x)=x3, f(x)= 3?x, f(x)=bx, f(x)=|x|, and f(x)=logb (x) where b is 2, 10, and e, and, when applicable, analyze the key attributes such as domain, range, intercepts, symmetries, asymptotic behavior, and maximum and minimum given an interval

      • What is Domain?What is Domain?

      What is Domain?

      Did you know that a relation has a domain? The domain of a relation is the set of the first coordinates from the ordered pairs. This tutorial defines the domain of a relation!