The following tables, mappings, sets, and graphs are all examples of relations that are not functions.


x
y
-3
-5
-2
-4
-2
-5
1
-1
2
0
{(-3, -6), (2, 4), (5, 11), (2, 18)} four points on graph two y values for x = 3
Map one x value to four different y values Vertical graph through x=-4 {(-4, -12), (1, 3), (2, 6), (1, 14)}
Graph- parabola opening left, vertex at (0,0)
x
y
5
20
3
14
2
11
2
10
1
8
Map two different x values to three different y values

Now that you have studied examples of relations that are not functions, use your notes to describe the similarities and differences of relations that are not functions.