SOLUTION: If y varies directly as x, what is the value of y in these ordered pairs? (5,8) and (10,y)

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Question 856552: If y varies directly as x, what is the value of y in these ordered pairs?
(5,8) and (10,y)
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
If y varies directly as x, what is the value of y in these ordered pairs?
(5,8) and (10,y)
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Varies directly means y = k*x
8 = k*5
k = 1.6
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y = 1.6*10 --> y = 16
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Or,
5/8 = 10/y
5y = 80
y = 16