<PRE><B>Question 71795</B>
w varies directly as x and inversley as the square of y. If x =15 and y=5, then w = 36. 
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If a varies directly as b then a=kb
If a varies inversely as b then a=k/b
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For your problem, w and x are on the same level; w and y^2 are on different levels:

w = k (x/y^2)

36 = k (15/25)
36 = k (3/5)
k = (5/3)*36
k = 60
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EQUATION:
w = 60x/y^2
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Cheers,
Stan H.</PRE>