Answer:
FIRST OPTION.
SECOND OPTION.
FOURTH OPTION.
Step-by-step explanation:
By definition, a relation is a function if an only if each input value ( each x- value) has only one output value (y-value).
Based on this you can identify that:
1. The relation
is a function.
2. The relation
is a function.
3. The relation
is not a function, because the input value 6 has two different output values:

4. The first table represents a function.
5. The second table does not represent a function, because the input value 0 has two different output values:
