SOLUTION: If y varies directly as x, and y = 7 when x=5, find y when x=15. y=?

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Question 1114101: If y varies directly as x, and y = 7 when x=5, find y when x=15.
y=?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
If y varies directly as x, and y = 7 when x=5,
find y when x=15.
----
Solve for "k"::
y = k*x
7 = k*5
k = 7/5
--------
y=(7/5)x
y = (7/5)15
y = 21
Cheers,
Stan H.
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