You can put this solution on YOUR website! If distance is plotted on the vertical
axis and time is on the horizontal axis,
then speed will always be the slope of
the line no matter what the starting point is.
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If you had with distance in feet
and time in seconds, that means you started from
50 ft ahead of the zero point and moved with a
speed 10 ft/sec which is the slope
Here's the plot:
