SOLUTION: y varies directly with x. If y is -32 when x is 4, find x when y is -40

SOLUTION: y varies directly with x. If y is -32 when x is 4, find x when y is -40

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Question 928960: y varies directly with x. If y is -32 when x is 4, find x when y is -40
Answer by MathLover1(20849) (Show Source): You can put this solution on YOUR website!

if varies with , then there is a constant such that

if when , we can find the constant

and our function is
so, to find when just plug known variable in
...solve for

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