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18 August, 17:24

The function f (x) varies directly with x and f (x) = 12 when x=8

Which answer is the direct linear variation equation?

A) f (x) = 8x

B) f (x) = 12x

C) f (x) = 2/3x

D) f (x) = 3/2x

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Answers (1)
  1. 18 August, 20:24
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    F (x) = kx

    12 = 8k

    k = 12/8 = 3/2

    Required equation is f (x) = 3/2 x
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