If $$x^2=y$$, then $$x^6$$ must equal which of the following?

Incorrect.
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Correct.
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Express $$x^6$$ in terms of $$x^2$$.
>$$x^6= (x^2)^3$$
Since $$x^2=y$$, you can conclude that $$(x^2)^3 = y^3$$.
Hence, this is the correct answer.

Incorrect.
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Incorrect.
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Incorrect.
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$$2y$$

$$3y$$

$$2y^2$$

$$y^3$$

$$2y^3$$