Answer:
Micky had the lowest unit rate of 0.3
Explanation:
For Jason, the distance travelled is given by:

The unit rate is the slope , which is ½ or 0.5
For Susan, she travels 3 miles is 5 minutes. Her unit rate is

Or 0.6
We can determine, Micky's unit rate from the graph. Using (20,6) and (40,12) on the graph, we determine the unit rate using,


Therefore Micky had the lowest unit rate