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After picking up a friend who Iives 10 miles away, Anna records her distance from home over time. The values are shown in the

After picking up a friend who Iives 10 miles away, Anna records her distance from home over time. The values are shown in the table below. Find her average speed over the first 6 hours. t (hours) 2 1 4 D(t) (miles) 10 55 153 214 282 90 240 300

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