Distance traveled by the car you are driving at the constant speed on the freeway. At 4:30pm you drive by the signb which provides distance to Montgomery, alabama as 84 miles AT 4:59 you drive by another sign which provides distance to Montgomery as 56 miles.
i) write the linear equation which provides the distance from montgomery in terms of time t(let t=0 represent 4:30pm and let t be estimated in minutes
ii) use equation in part a to determine time when you reach montgomery.