Question

If y varies directly with x and

y = 48 when x = 6, find y if x = 3.
First, find the direct variation equation.
y = [? ]x

Answer 1

so this is direct proportional question
so y=(k)x
sub y=48 and x=6
48=6k
k=8
now you got a constant k
now sub x=3
y=(8)(3)
=24