A student records the position of a trolley and obtains the following data:
Time t (s): 0, 2, 4, 6, 8
Distance s (m): 0, 4, 8, 12, 16
If the distance–time graph is plotted using this data, what will be the slope of the line segment between t=2s and t=6s?
(a) 4m/s
(b) 1m/s
(c) 2m/s
(d) 3m/s