Answer:
Fourth and Fifth tables.
Explanation:
A function is a relationship where each value of the input is related with only one value of the output. It means that when a value of input appears several times, the output should be the same.
Therefore, the first, second, and third tables are not functions because:
In the first table, the input -1 is related to an output of -1 and 1.
In the second table, the input 0 is related to an output of 6 and 7.
In the third table, the input -1 is related to 7 and 0.
Since the inputs don't repeat in the fourth and fifth tables, we can say that these tables are functions.
So, the answers are:
Fourth and Fifth tables.
