which table represents a function?

Answer:
Answer:table 4 represent a function
Answer:table 4 represent a function check table 1, second row are equal which automatically disqualified itself
Answer:table 4 represent a function check table 1, second row are equal which automatically disqualified itselfcheck table 2, the same thing in table happens again
Answer:table 4 represent a function check table 1, second row are equal which automatically disqualified itselfcheck table 2, the same thing in table happens againEven in table 3, it still repeat
Answer:table 4 represent a function check table 1, second row are equal which automatically disqualified itselfcheck table 2, the same thing in table happens againEven in table 3, it still repeatBut check the last table, nothing repeat which definitely makes it a function
Answer:
see attached
Step-by-step explanation:
A function is a relation that has one output for each input value. A table that represents a function will have no repeated inputs.
__
A. there are no repeated x-values. This table represents a function
B. -5 is a repeated x-value. The relation is not a function.
C. -2 is a repeated x-value. The relation is not a function.
D. -4 is a repeated x-value. The relation is not a function.