Question

Which of the following relations is a function? A. (7, 1), (-2, 4), (4, 1), (7, 2) B. (4, 0), (-2, 3), (7, 1), (-2, 5) C. (4, 4), (-2, 2), (7, 1), (-7, 2) D. (4, 4), (-2, 6), (4, 3), (-7, 2)

Answer 1

C. (4, 4), (-2, 2), (7, 1), (-7, 2)

In mathematics, a function from a set X to a set Y assigns to each element of X exactly one element of Y.[1] The set X is called the domain of the function[2] and the set Y is called the codomain of the function