Answer:
Not a function. See below the explanation.
Step-by-step explanation:
Function is a set of relation with different domains. That means we cannot have same or repetitive domain in one set.
Domain is the set of all x-values. So we only focus on x-term. From the table, we notice that there are two same domains which are - 7. Function cannot have the same or repetitive domain.
Therefore, not a function.
