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The velocity-time graph displays a straight diagonal line located in the negative region of the graph. The line starts at a high velocity value and slopes towards the v=0 m/s level. The slope of the line represents the acceleration of the object; the fact that this line is sloped means the object is changing its velocity. The object starts a high speed and slows down to rest (v=0 m/s). The velocity is negative (the line is in the negative region) the entire time. Thus, the velocity-time graph represents an object that starts with a high speed and slows down while moving in the negative direction.
A negative velocity is represented on a position-time graph by a line that slopes downward. An accelerated motion is represented on a position-time graph by a curved line. The slope of the line on a position-time graph represents the objects velocity (speed and direction). Since the object starts fast and finishes at rest, the curve of the line on the position-time graph should start with a steep slope and gradually level off to a zero slope.
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