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)

Two groups of students were asked how many hours they spent reading each day. the table below shows the numbers for each group: group a 1 2 1 1 3 3 2 2 3 group b 3 2 3 2 2 2 1 1 2 based on the table, which of the following is true? the interquartile range for group a students is 0.5 less than the interquartile range for group b students. the interquartile range for group a students is equal to the interquartile range for group b students. the interquartile range for group a employees is 0.5 more than to the interquartile range for group b students. the interquartile range for group a employees is 1 more than the interquartile range for group b students.