SOLUTION: Y varies directly with respect to x. When x= -5, and y=20 what is y when x=18?

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Question 143442: Y varies directly with respect to x. When x= -5, and y=20 what is y when x=18?
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
y/18 = 20/-5 Proportion
y/18=-4
18y/18=-4*18
y=-72
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Ed