Question

Which of the tables represents a function?

Table A
Input
Output
8
−9
8
−8
10
−8
Table B
Input
Output
4
11
7
12
7
13
Table C
Input
Output
−4
0
−3
3
−2
5
Table D
Input
Output
10
0
10
4
3
7









Table A
Table B
Table C
Table D

Answer 1

The answer is Table C!

Answer 2

Table C would represent a function because the x values do not repeat.
For it to be a function the x has to have exactly one y value.