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# Recognizing Real Numbers: Possible Values

GMAT-YNKQBG

Assume $x$ and $y$ represent real numbers.

If $3x=y^3$, which of the following is not a possible value for $y$?

A

$-3$

B

$-0.6$

C

$0$

D

$5$

E

They are all possible values.