NOT A FUNCTION

When x= 0, y= -2 and y =1.
One single x maps to two y's.

(1,3),(-2,5),(3,-6),(2,3),(0,0)

FUNCTION

NOT A FUNCTION

When x= 6, y= -2 and y =8. One single
x maps to two y's. A vertical
line will cross the graph in two points

NOT A FUNCTION

When x= 0, y= 0, y = 3, y=-3. One single
x maps to many y's. A vertical line will cross
the graph in many points

(0,0),(3,1),(12,5),(4,-6),(-2,4)

FUNCTION

Input,x	-2	-1	0	1	2	2
Output,y	2	9	5	3	1	8

NOT A FUNCTION

When x= 2, y= 1 and y =8.
One single x maps to two y's.

NOT A FUNCTION

x = 3 maps to two y's, 1 and 5.

Input,x	-3	-1	-3	1	2	5
Output,y	2	9	2	3	1	8

FUNCTION