The figure given below shows the position-versus-time graph describing the motion of a body moving in a straight line. Determine the times at which the velocity is most positive and most negative.

• A. most positive: t = 0 s to 6 s, most negative: t = 8 s to 10 s
• B. most positive: t = 0 s to 2 s, most negative: t = 6 s to 8 s
• C. most positive: t = 8 s to 10 s, most negative: t = 4 s to 6 s
• D. most positive: t = 4 s to 6 s, most negative: t = 8 s to 10 s

Answer: (D)