damariwave damariwave

19-10-2018
Mathematics

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If f(x) varies directly with x and f(x) = 32 when x = -8, then what is f(x) when x = 4?

If fx varies directly with x and fx 32 when x 8 then what is fx when x 4 class=

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wegnerkolmp2741o wegnerkolmp2741o

19-10-2018

f(x) = 32 when x=-8

32 = k*-8

32/-8 =k

k=-4

f(x) = kx

f(x) = -4 * 4

f(x) = -16

choice A

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