A graph of position versus time for a certain particle moving along the x-axis is shown in the figure below. Find the instantaneous velocity at the following instants.
(a) t = 1.00 s
(b) t = 3.00 s
(c) t = 4.50 s
(d) t = 7.50 s
I know that a) is 5 m/s and c) is 0 m/s, but I need...