Which situation could this graph represent?
A Running up a hill, then walking up the hill
B Driving a car at the same constant speed.
C Walking down a hill, then running down the hill.
D Driving a car at a fast constant speed, then driving at a slower constant speed.

Which situation could this graph represent A Running up a hill then walking up the hill B Driving a car at the same constant speed C Walking down a hill then ru class=