Your answer would approximately be 1/6 because you could get a 3 or greater one out of 6 chances
X=1, y=3 because 2x1 is 2 and 3x3 is 9, 2 plus 9 equals 11 and 11 plus 4 equals 15
X equals negative one for both equations
In order to find your starting point just retrace your steps, when you move left on a graph think of subtracting when you move right think of adding. In this case though we need to do the opposite to find the starting point, -5+9 = 4. (4,0) is the point that you were on after the transition right three times. Now subtract three from four. 4-3=1, your starting point was (1,0).