Determine Whether the Relation Defines $y$ As a Function Of $x$ Give the Domain

Multiple Choice

Determine whether the relation defines $y$ as a function of $x$ . Give the domain.
- $y=x^{3}$

A) Not a function; domain: all whole numbers
B) Function; domain: all whole numbers
C) Function; domain: $(-\infty, \infty)$
D) Not a function; domain: $(-\infty, \infty)$