Posted by George on .
if y varies directly as x find the direct variation equation for the situation:
y=20 and x=16

Math 
Reiny,
if y varies directly as x
becomes
y = kx, where k is a constant
so if y=20 and x=16
20 = 16k
k=5/4
therefore y = (5/4)x
most of these question are that simple.