Questions on Algebra: Absolute value answered by real tutors!

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Question 147657: If y varies directly as x, and y = 16 when x = 20.
Find y when x = 5. : If y varies directly as x, and y = 16 when x = 20.
Find y when x = 5.
Answer by Fombitz(1756) About Me  (Show Source):
You can put this solution on YOUR website!
If y varies directly as x, then it fits a formula,
y=kx
From your examples,
16=k(20)
k=16/20=4/5
y=(4x)/5
When x=5, then
y=(4x)/5
y=(4(5))/5
y=4