identify functions using sets of ordered pairs, tables, mappings, and graphs

How Can You Tell if a Relation is Not a Function?

Every function is a relation, but not every relation is a function! Watch this video to learn how to tell which relations are functions and which are not.
What is a Linear Function?
What's a Function?

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!
How Can You Tell if a Function is Linear or Nonlinear From a Graph?