Use + to depict the forward direction and use to depict the backwards direction. Using the graph above, calculate the average velocity of the object from Os to 5 s. av. velocity = Using the graph above, calculate the average velocity of the object from 5 s to 15 s. av. velocity = units: av. velocity = Using the graph above, calculate the average velocity of the object from 15 s to 30 s. units: Submit Question units: Explain the meaning of the negative slope between 15 s and 30