Given,
From the graph, the total displacement of the given object is d=0-7=-7 m
The total time duration, t=12 s
The average velocity is defined as the ratio of the total displacement to the total time duration.
Thus the average velocity of the given object is,
On substituting the known values,
Thus the average velocity of the given object from t=0 s to t=12 s is 0.583 m/s.