Notice that the position of our particle is marked at two times. At time = 1, t_{1} in this case, the position is at 3 meters from the
origin
. At time = 16, t_{2} in this case, the position is at 13 meters from the origin. We label the initial point on the graph P_{1} and the final point P_{2}. P_{1} has coordinates (t_{1},x_{1}) and P_{2} has coordinates (t_{2},x_{2}) in this plot. Click on the Action button for an example of one posible motion of the particle from P_{1} to P_{2}.