Question

Question
(3 points)
Determine whether the following relations are functions



x y
2 4
-3 5
8 0
2 4

Answer 1

Yes — this is a function. Each input x has exactly one output y: 2 → 4 (even though 2 appears twice, both times it maps to 4), −3 → 5, and 8 → 0. If a repeated x had different y-values it would not be a function.