Answer to Question #308072 in Calculus for Bob Martin

Question

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

your answer

Answer 1

Since $P$ contains two different pairs $(1,7)$ and $(1,3)$ with the same first coordinate, we conclude that $P$ is not a function.