Question 285589
Write a function that models the variation.
{x=3 & y=12} if z=2 
z varies directly with y and inversely with x. 
I tried this problem, and came up with the equation,
z=(1/18y)/x
Is this correct? If not, how do I solve this problem?
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z = ky/x
2 = 12k/3
k = 1/2
--> z = y/2x