1. Objectives The student will be able to: 1. To determine if a relation is a function. 2. To find the value of a function. SOL: A.7aef Designed by Skip Tyler, Varina High School

3. Function Notation Output Input Name of Function

4. Determine whether each relation is a function. 1. {(2, 3), (3, 0), (5, 2), (4, 3)} YES, every domain is different! f ( x ) 2 3 f ( x ) 3 0 f ( x ) 5 2 f ( x ) 4 3

5. Determine whether the relation is a function. 2. {(4, 1), (5, 2), (5, 3), (6, 6), (1, 9)} NO, 5 is paired with 2 numbers! f ( x ) 4 1 f ( x ) 5 2 f ( x ) 5 3 f ( x ) 6 6 f ( x ) 1 9

8. Vertical Line Test NO WAY! FUNCTION! FUNCTION! NO!

11. Given h (z) = z 2 - 4z + 9, find h (-3) (-3) 2 -4(-3)+9 -3 30 9 + 12 + 9 h(-3) = 30