SOLUTION: If y is directly proportional to x and y=8 when x=10 what is the value of ywhen x=5

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Question 824518: If y is directly proportional to x and y=8 when x=10 what is the value of ywhen x=5
Found 2 solutions by TimothyLamb, stanbon:
Answer by TimothyLamb(4379) About Me  (Show Source):
You can put this solution on YOUR website!
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y = Kx
8 = K(10)
K = 8/10
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y = (8/10)x
x = 5
y = (8/10)5
y = 4
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Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
If y is directly proportional to x
y = kx
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Solve for "k" using "y=8 when x=10"
8 = k*10
k = 4/5
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Equation:
y = (4/5)x
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What is the value of y when x=5?
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y = (4/5)(5)
--
y = 4
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Cheers,
Stan H.
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