Each of the Exercise describes a trip you made along a straight road connecting two cities 120 miles apart. Sketch the graph of the distance d from your starting point (in miles) as a function of the time t elapsed (in hours). Also describe the function d(t) symbolically.
Exercise
You traveled for 1 hour at 45 miles per hour, then realized you were going to be late, and therefore traveled at 75 miles per hour for the next hour.
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