Notice that the position of our particle is marked at two times. At time = 1, t₁ in this case, the position is at 3 meters from the origin . At time = 16, t₂ in this case, the position is at 13 meters from the origin. We label the initial point on the graph P₁ and the final point P₂. P₁ has coordinates (t₁,x₁) and P₂ has coordinates (t₂,x₂) in this plot. Click on the Action button for an example of one posible motion of the particle from P₁ to P₂.