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

Answer 1

if you have duplicate "inputs" then the output has to be the same number
a function does not have duplicate input numbers with different output numbers.

Answer 2

so it would be 3,3