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The variable x and y are directly proportional and y=2 when x=3. what is the value of y when x=9?
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The variable x and y are directly proportional and y=2 when x=3. what is the value of y when x=9?

User Althia
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1 Answer

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y = kx is the direct variation equation, where k is the constant of variation.
Find k.

2 = k * 3
2/3 = k

Write the variation equation.
y = (2/3)x

Plug in new value.
y = (2/3)* 9
y = 6
User Milana
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