SOLUTION: If y varies directly as x, and y = 16 when x = 20. Find y when x = 5.

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Question 147657: If y varies directly as x, and y = 16 when x = 20.
Find y when x = 5.
Answer by Fombitz(32388) 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%2820%29
k=16%2F20=4%2F5
y=%284x%29%2F5
When x=5, then
y=%284x%29%2F5
y=%284%285%29%29%2F5
y=4