I think the answer is maybe A
Answer:
Yes
Step-by-step explanation:
The relation is a function. For a relation to be a function there must be a unique x value for each y value. So this means x's can not repeat, and in this relation, the x-values never repeat. Therefore this is a function.
(20 + 12) - 8, since the question states n is EIGHT less than the sum of 20 and 12.