Answer to Question #180674 in Discrete Mathematics for justy

Question

Consider the relation 𝑃 = {(1,7), (−1,7), (3,9), (1,3)}. Is 𝑃 a function? Justify your answer.

Answer 1

In a function, every element of the domain is paired with only one element of the range. In this problem, the value 1 in the domain is paired with 7 and 3. Therefore, this relation P is not a function.