2) On many interstate highways, numbered posts are placed every mile alongside the road. At right is a record of the clock times at which a car passed several mileposts. a) Plot a graph of mile number verses clock time. The origin of the graph (the point where the axes cross) should be mile number 0 and clock time 1:00. b) Is the motion uniform? Clock Mile Number Time 40 1:00 50 1:11 60 1:22 70 1:33 c) What is the slope of this graph at each of the measured clock times.