Answer
The graph is drawn in the image, V = 2.7 m/s
Work Step by Step
Please see the attached image first.
The velocity is the slope of a position-versus-time graph. Since the object’s velocity is constant and it moves in the +x direction, the graph will be a straight line with a positive slope, beginning at x = −16 m when t = 0 s. At t = 18 s, we can get the position should be
x = −16 m + 48 m = +32 m.
The position-versus time graph for the motion is given in the image.
The velocity of the object = slope of the graph = $\frac{32\space m -(-16\space m)}{18\space s -0}=2.7\space m/s$