The graph shows the speed of a vehicle during the final 50 seconds of a journey. At the start of the 50 seconds the speed is k metres per second.
The distance travelled during the 50 seconds is 1.7 kilometres.
a) Work out the average speed of
the vehicle during the 50 seconds.
Give your answer in m/s.
34 m/s
* Speed (m/s)
b) Work out the value of k.
10
40
50
20 30
Time (seconds)