Which of the following equations shows direct variations a) y= x/3 + 1 b) y= 3x c) y=3/x

A) Not a direct variation since it is not in the form y = k*x
B) is a direct variation since it is in the form y = k*x where k = 3
C) Not a direct variation. This is an inverse variation since it is in the form y = k/x

Choice B only