Question

Which of the tables represents a function?

Table A


Input

Output


4 3
3 2
2 1

Table B


Input

Output


1 3
3 5
3 7

Table C


Input

Output


0 0
1 4
1 5

Table D


Input

Output


4 1
4 2
4 3










Table A

Table B

Table C

Table D

Answer 1

Table A would be the only correct one

Explanation:

Answer 2

In order to be a function, you cannot repeat x-values. Therefore, Table A is the only table that represents a function.