Which of these on a linear graph showing time and distance would indicts rate of change of 80km per hour
(4320) and (6480)
(5400) and (6560)
(4480) and (6600)
(4400) and (6480)
(4320) and (6480)
(5400) and (6560)
(4480) and (6600)
(4400) and (6480)