1. Warm Up
Determine the domain and range for each relation. Tell me if it’s a function or not a function x –2 –1 1 2 y 3 –3 –5
{(0, 1), (1, 2), (1, 3), (2, 4)}

2. 3.2-Representing Functions Standard 16.0 & 18.0

3. The vertical line test is used to determine if a graph is a function.

4. If a vertical line passes through a graph more than once, the graph is not the graph of a function.
The pencil crosses the graph more than once. This is not a function because there are two y-values for the same x-value.

11. Use the vertical line test to visually check if the relation is a function.
(4,4)
(-3,3)
(1,1)
(1,-2)
Function?
No, Two points are on
The same vertical line.

12. Use the vertical line test to visually check if the relation is a function.
(-3,3)
(1,1)
(3,1)
(4,-2)
Function?
Yes, no two points are
on the same vertical line

13. Plot:
(-3,5)
(-4,-2)
(4,3)
(3,-4)