an observer recorded the following data for the motion of a car undergoing constant acceleration from 3.0 seconds to 5.0 seconds. What was the magnitude of the car's acceleration ?

The acceleration is given as:
[tex]a=\frac{v_f-v_0}{t_f-t_0}[/tex]Using the first two rows we have:
[tex]a=\frac{6-4}{4-3}=\frac{2}{1}=2[/tex]Therefore the acceleration is 2 meter per second per second.