SOLUTION: y is directly proportional to x, and y = 20 when x = 6. What is y when x = 14?

Algebra ->  Decimal-numbers -> SOLUTION: y is directly proportional to x, and y = 20 when x = 6. What is y when x = 14?      Log On


   

Question 1109382: y is directly proportional to x, and y = 20 when x = 6. What is y when x = 14?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
y is directly proportional to x, and y = 20 when x = 6. What is y when x = 14?
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y = k*x
20 = k*6
k = 10/3
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What is y when x = 14?
y = 14*10/3 = 140/3
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You don't have to solve for k:
20/6 = y/14
Cross multiply
6y = 280
y = 140/3