Author: Martha Morton

Relation—a set of associated inputs and outputs.
Function—a relation where each input has only one output.
Function Relation (Not a Function)
(2, 4) (5, -2) (2, 4) (-3, -7) (2, 6) (5, -2) (2, 4) (-3, -7)

X	-3	4	8	2
y	3	-2	0	-2

X	2	4	8	2
y	3	-2	0	-2

3
-2
4

4
-2
3

3
-2
4

4
-2
3