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16-12-2016
Mathematics

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y is directly proportional to x, and y =216 when x=2 find y when x=7

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pingwin09 pingwin09

16-12-2016

y = kx
@ y = 216, x = 2
k = y/x = 216/2 = 108

@ x=7
y = (108)(7) = 756

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