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Suppose y varies directly with x and y = 72 when x = 6. What direct variation equation relates x and y? What is the value of y when x = 10?

2 answers

a. Y = kx
72 = k*6, k = 12.
Eq: Y = 12x.

b. Y = 12 * 10 = 120.
y varies directly with x and y=72 when x=6
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