Which set of ordered pairs represents a function from P to Q? P = {5, 10, 15, 20} Q = {-1, 1, 3}
A) {(5, -1), (10, 1), (10, 3), (15, 1), (20, -1)}
B) {(15, -1), (15, 1), (15, 3)}
C) {(15, 1), (10, -1), (5, 1), (10, 3), (15, -1)}
D) {(10, 1), (15, 3), (20, 1)}
E) {(5, 3), (15, 1), (5, -1), (15, 3)}

Question

Quizplus · Accepted Answer

A function mapping from P to Q should have every element of P appearing in the domain of the function, with each element of P mapping to exactly one element of Q. Option D is the only set of ordered pairs that satisfies both of these criteria.

Which Set of Ordered Pairs Represents a Function from P