explain it if u know please

Answer: B
Explanation: The straight line shows the theoretical average of the actual velocity and the curved line show that it is less than the average velocity of the object within 6 seconds.
straight line:
3. 3,80
6. 6,160
curved line:
A.K.A.-- the only place where the straight line and the curved line meet at is only at coordinate 6,160.