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Stuck on this problem need help!

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The numbers x^3 and y^3 are inversely proportional. If x = 2 when y = 15, what is y if x = 1 and y is positive? Write your answer in simplest radical form.

Mar 23, 2019

#2
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Mar 24, 2019
#3
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The numbers x^3 and y^3 are inversely proportional.

This is what that means

$$y^3=\frac{k}{x^3}\\$$

Now sub in x = 2 when y = 15 and solve for k

Once you have k you can plug in x=1 and find the corresponding value of y

Now you can answer yourself  :)