SOLUTION: If y varies directly as x and y=−21 when x=40, find y if x=43. (Round off your answer to the nearest hundredth.)

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Question 1167316: If y varies directly as x and y=−21 when x=40, find y if x=43. (Round off your answer to the nearest hundredth.)
Answer by josgarithmetic(39630) About Me  (Show Source):
You can put this solution on YOUR website!
y=kx

k=y%2Fx

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y=−21 when x=40
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k=-21%2F40
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