Identifying a Function
Input Output Rule
Input Output
-4
-1
-1
1
2
2
2
-2
0
3
x
x
4x
Does the table represent a function? If not, justify your
reasoning.
A
B
C
1x D
Yes, because on a graph (1, 0) will intercept the
y-axis at 0.
Yes, the table represents a function.
No, because (-1, 2) and (-1,-2) have the same
input value.
No, because (-4, 2) and (-1, 2) have the same
output value..