Answer
y=1/6x
Work Step by Step
Since the general form of a direct variation is y=kx, lets substitute the value of y and x into this equation:
1/2=3k (Divide both sides by 3)
1/6=k
Now lets plug this value of k into the standard form of a direct variation:
y=1/6x
So, this is our equation that relates x and y in this problem.