Question

Which of the tables represents a function? (5 points)

Table A
Input
Output
7 2
1 8
5 6

Table B
Input
Output
5 2

3 5

5 6

Table C
Input
Output
1 2

1 9

7 3

Table D
Input
Output
2 6

6 7

6 2

Select one:
a. Table A
b. Table B
c. Table C
d. Table D

Answer 1

Table A

Explanation:

The law of a function is that each x can have only one y. Each of the tables (except for A) shows that an x goes to more than one y.

Example: Table B shows that 5 (the x point) goes to both 2 and 6.

Table A is the only table with out a doubling x.