If x ∝ y , and y = 9 when x = 3. If value of y = 27 then value of x =
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If x ∝ y then x varies directly as y.
When y = 9 , x = 3
Putting this in x = ky we get 3 = 9k
⇒ k =1/3
putting k = 1/3 and y = 27 in x = ky we get x = 27/3 = 9.