Examples of Function Notation, and Definition of Relation!

Definition:

A relation is a correspondence between two sets (called the domainand the range) such that to each element of the domain, there is assigned one or more elements of the range.

FUNCTION NOTATION

We write f (x) to mean the function whose input is x

Example

If

f(x) = 7

then

f(12) = 7

Here f is called the constant function. Whatever comes in to f, the number 7 comes out.

http://www.ltcconline.net/greenl/courses/152a/functgraph/relfun.htm

This is a great website if you need example problems, or help on the upcoming test!