1. VOCABULARY! EXAMPLES!
Relation:
Domain:
Range:
Function:
Functions can be represented by:
Graphs Tables Ordered Pairs Function Rules
A set of ordered pairs
The set of all the input (x) values
The set of all the output (y) values
A special relation that has exactly ONE output for each input (or exactly ONE y value for each x value)
( , )
y = 2x + 1
y = 4x
y = x2 -1
Input
Output

2. Input-Output Tables
By looking at each input-output table, tell whether or not the relation is a function.
If it is a function, state the domain and range.
Input
Output x y
Input
Output x y

3. Make an input-output table for a function given a specific domain.
State the range of the function.

4. To create an input-output table from the given rule:
Step 1:
Step 2: 2. 4.
Choose values for x (It is best to choose two negative values, zero, and two positive values).
Evaluate the function at these values and complete the input-output table.