Calculus Volume 1

Chapter 5 | Integration

583

253. [T] An athlete runs by a motion detector, which records her speed, as displayed in the following table. The best linear fit to this data, ℓ ( t ) =−0.068 t +5.14, is shown in the accompanying graph. Use the average value of ℓ ( t ) between t =0 and t =40 to estimate the runner’s average speed. Minutes Speed (m/sec)

0

5

10

4.8

20

3.6

30

3.0

40

2.5

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