Find the constant of proportionality k, and write the linear function relating the two variables.Suppose that y varies jointly with x and z. When y = 54, x = 27 and z = 18.
A. k = 
; y = 
B. k = 
; y = 
xz
C. k = 
; y = 
xz
D. k = 
; y = 
Answer: C
Mathematics
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B. - 
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B. 
C. 
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A. 
B. 
C. 
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