1. Function
Rules and Tables

2. Function Relation- Any set of order pairs
(1,2) (2,4) (3,4) (2, 7) (5,4)
Domain- (input) X coordinate
{1, 2, 3, 2, 5}
Range – (output )Y coordinate
{2, 4, 9, 7, 4}

3. Function
Function- each number of the domain (input, x coordinate) associates with only one member of the range (output, y coordinate)
Input x 1 2 3 5
Output y 2 4 9 7

4. Function
When ever a member of the domain associates with more then one range then it is not a function.
Input X
Output Y 1 2 2 4 9 3 5 7

5. Function (1 ,2 ) ( 2 , 4) ( 3 , 4 ) (2 , 7) (5 , 4) Input X Output Y 29 3 7 5