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Find an Equation of Variation in Which the Following Are yy

Question 224

Multiple Choice

Find an equation of variation in which the following are true.
- yy varies directly as xx and inversely as zz , and y=18y = 18 when x=2x = 2 and z=9z = 9 .


A) y=81xzy = \frac { 81 x } { z }
B) y=85xzy = \frac { 85 x } { z }
C) y=84xzy = 84 x z
D) y=80zxy = \frac { 80 z } { x }

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