2.7. Model: The graph shows the assumption that the blood isn't moving for the first 0.1 s nor at the end of the beat. Visualize: The graph is a graph of velocity vs. time, so the displacement is the area under the graph-that is, the area of the triangle. The velocity of the blood increases quickly and decreases a bit more slowly. Solve: Call the distance traveled Ay. The area of a triangle is - HH. AV= NI - BH = - (0.20 s) (0.80 m/s) =8.0 cm Assess: This distance seems reasonable for one beat