The position-time graph shows that the slope is changing (meaning a changing velocity) and negative (meaning a negative velocity). The velocity-time graph shows a line with a negative (downward) slope (meaning that there is a negative acceleration) Velocity is a measure of speed and direction. Initial Speed is the beggining speed and Final speed is the final speed. If initial speed is 0 m/s than it starts at zero, but Final speed gets to zero after the object slows down enough and deccelerates and loses all motion.
When the displacement bcome zero the velocity becomes zero
the vlcty at initial point.-initial velocty
the velocty at final point -final velocty

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