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Given: y varies jointly as x and z, and y = 16 when x = 1/2 and z = 8. What equation represents the joint variation function?

A. y = 4x/z

B. y = 4x

C. y = 1/4xz

D. y = 4xz

 May 15, 2019
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y = k*(xz) where k = constant
16=k*(1/2*8)
16 =k*4
k = 4. Therefore:
y =4xz. Or D.

 May 16, 2019
edited by Guest  May 16, 2019

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