SOLUTION: Y varies directly as the cube of x. When x=3, then y=5. How do I find y when x=4?

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Question 1137137: Y varies directly as the cube of x. When x=3, then y=5. How do I find y when x=4?
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
Y

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y=k%2Ax%5E3
variation constat, k
direct variation

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k=y%2Fx%5E3
k=5%2F27
highlight%28y=%285%2F27%29x%5E3%29