You can put this solution on YOUR website! y=1/3x
Set x=0 & solve for y
y=0/3
y=0 or (0,0) is one point.
Set x=3 & solve for y
y=3/3
y=3 or(3,1) is another point.
Now draw a line through these 2 points. (graph 400x400 pixels, x from -5 to 5, y from -5 to 5, y = x/3).