A speed-time graph shows that a car moves at 20 m/s for 15 s. The car’s speed then steadily decreases until it comes to a stop at 40 s. Which of the following describes the slope of the speed-time graph from 15 s to 40 s?
A. linear, horizontal
B. curved, upward
C. linear, sloping downward
D. linear, sloping upward
agent0smith

Question

A speed-time graph shows that a car moves at 20 m/s for 15 s. The car’s speed then steadily decreases until it comes to a stop at 40 s. Which of the following describes the slope of the speed-time graph from 15 s to 40 s?
  A. linear, horizontal 	
  B. curved, upward 	
  C. linear, sloping downward 	
  D. linear, sloping upward
agent0smith

johnweldon1993 · Answer

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johnweldon1993 · Answer

So if I'm traveling at a constant speed for 15 s, nothing would change on the 'y' axis...i would stay at 20 m/s

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johnweldon1993 · Answer

Then, if my speed is steadily decreasing from 15 to 40 seconds...i would be going linearly down to 0 on the 'y' axis...and then I'm stopped...so I stay at 0

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johnweldon1993 · Answer

So what kind of slope do we have:

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?

j3nny0rtiz · Answer

c.