In 1960, the world record for the men’s mile was 3.91 minutes. In 1980, the record mile was 3.81 minutes. Write

In 1960, the world record for the men’s mile was 3.91 minutes. In 1980, the record mile was 3.81 minutes.

Write a linear model that represents the world
record (in minutes) for the men’s mile as a function
of the number of years since 9160.
Use the model to estimate the record time in 2020
and 2040. How accurate is the 2020 estimate?


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