SOLUTION: For the following problem, y varies directly as x. If y = 25 when x = -15, find x when y is 10.

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Question 1056244: For the following problem, y varies directly as x.
If y = 25 when x = -15, find x when y is 10.
Answer by Edwin McCravy(20060)   (Show Source): You can put this solution on YOUR website!
y varies directly as x.

If y = 25 when x = -15, 
Substitute that in



Solve for k

Multiply both sides by -15





Substitute that in 



  <-- that's the formula

find x when y is 10.
Substitute 10 for y





Multiply both sides by 3



Divide both sides by -5



Edwin
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