The graph illustrated is divided into three seperate sections namely A, B and C, the short story culled from the graph is described thus:
Rate of change or slope = (Rise/ Run)
SECTION A:
Slope = (40 - 0) ÷ (20 - 0) = 40/20 = 2
Distance traveled = 50 meters
SECTION B :
This section gives an horizontal line, hence, the slope is 0.
Distance covered = 0 ; as there was no change in the distance over the period of time.
SECTION C:
Slope = (80 - 50) ÷ (70 - 60) = 30/10 = 3
The total distance traveled = 80 - 50 = 30 meters
The total distance and time spent traveling :
Total distance traveled = (50 + 30) = 80 meters
Total time spent = 70 seconds (time at the 80 meter mark)
Hence, the story.
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