Before watching the videos, think about and answer these questions to the best of your ability.

A car speeds up as it drives away from a traffic light. The car’s GPS unit records its distance from the light in the table below:


Table 1: Time and Distance
Time (seconds) Distance (meters)
0 0
1 1
2 3
3 6
4 10
5 15
6 21
7 27

How could you compute an approximation of the car’s speed at the 5-second mark?
1.   meters per second 2.   meters per second 3.   meters per second 4.   meters per second 5.  The average of #3 and #4 6.  Another method and answer 7.  There isn’t enough information provided to approximate the speed
Is the value you computed:
Equal to the car’s speed at the 5-second mark An underestimate of the car’s speed at the 5-second mark An overestimate of the car’s speed at the 5-second mark Neither an underestimate nor an overestimate You can’t tell without having more information
How could you improve your approximation of the car’s speed at the 5-second mark?
You don’t need to make an improvement because the speed you calculated is the car’s speed at the 5-second mark Use a different pair of points from the table to compute the speed Use two pairs of points from the table to compute two speeds, and then average these speeds Use a larger interval of time (e.g., if you originally used a 1-second time interval, a 2-second time interval would improve your approximation) Use a smaller interval of time (which would require additional information)