Question

Which relation is also a function?

Answer 1

A function is a relation that associates each element x of a set X, to a single element y of another set Y.

Look at the picture.

Answer (green)

Answer 2

The last choice is correct

x: 2, 3, 4, 5

y: 1, 1, 1, 1

Explanation:

In a function the domain (x) cannot repeat