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in 1920 the record for a certain race was 46.4 sec. In 1960 it was 45.6 sec.

Let R(t)=the record in the race and t= the number of years since 1920.

a. find a linear function that fits the data.
b. Use the function in (a) to predict the record in 2003 and in 2006.
c. Find the year when the record will be 44.52 sec

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