Question 406199
When x = 2 and y = 3, z = 42. Write the function that models each of the following relationships.
1. z varies inversely with x and directly with y.
z = k*3/2
z = (3/2)k
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2. z varies jointly with x and y
z = k*2*3
z = 6k
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3. z varies directly with x and inversely with the square of y 
z = k*x/y^2
z = k*2/9
z = (2/9)k
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Cheers,
Stan H.