Question

20points! Plz help Select which relations are functions

Answer 1

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

First graph: YES

Second graph: NOT (for x = 4 are two values of y)

Third graph: NOT (for x = 2 are two values of y)

Fourth graph: YES