this equation y = x/3 is in for off y = mx+b it has slope(m) = 1/3 and y-intercept (b) = 0. as b = 0 the origin would be (0,0) now use m to find the 2nd point. slope = y/x = rise /run = 1/3 move up 1 and right 3 and you get point (3,1) connect the two dots and you have your graph.
