Translate the Given Formula to an English Phrase Using the Word

Multiple Choice

Translate the given formula to an English phrase using the word "varies".
- $\mathrm { y }$ varies directly as the square of $\mathrm { z }$ and $\mathrm { y } = 384$ when $\mathrm { z } = 8$ . Find $\mathrm { y }$ when $\mathrm { z }$ is 9 .

A) 432
B) 486
C) 48
D) 72