Jane is driving a racecar The table below gives the distance D t in meters she has driven at a few times t seconds after she starts Time t seconds 0 2 5 7 9 Distance D t meters 0 78 6 151 5 205 1 255 9 a Find the average rate of change for the distance driven from 0 seconds to 2 seconds meters per second b Find the average rate of change for the distance driven from 7 seconds to 9 seconds meters per second