Answer :
(a) for the time interval of 0 to 2s, the average velocity is 3 m/s.
(b) for the interval of 0 to 4s, the average velocity is - 3 m/s.
(c) for the interval of 2s to 4s, the average velocity is - 6 m/s.
(d) for the interval of 4s to 7s, the average velocity is 1.33 m/s.
(e) for the interval of 0s to 8s, the average velocity is -0.75 m/s.
How to calculate the average velocity of the object?
The average velocity of the object is calculated by applying the following formula as follows;
v = total displacement / total time of motion
(a) for the interval of 0 to 2s, the average velocity is;
v = (6 m - 0 m ) / (2 s - 0 s)
v = 3 m/s
(b) for the interval of 0 to 4s, the average velocity is;
v = ( - 6 m - 6 m ) / ( 4 s - 0 s )
v = - 3 m/s
(c) for the interval of 2s to 4s, the average velocity is;
v = ( - 6 m - 6 m ) / ( 4 s - 2 s )
v = - 6 m/s
(d) for the interval of 4s to 7s, the average velocity is;
v = ( - 2 m - (- 6m ) ) / ( 7s - 4 s)
v = ( -2 m + 6 m ) / ( 3 s )
v = 1.33 m/s
(e) for the interval of 0s to 8s, the average velocity is;
v = ( 0 m - 6 m ) / ( 8 s - 0 s)
v = -0.75 m/s
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The missing graph of the position versus time is in the image attached.