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April 18, 2015

April 18, 2015

Posted by **PJ** on Friday, November 7, 2008 at 6:26pm.

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 45.7 sec.

Find a linear function that fits the data.

R(t)=

- ALGEBRA -
**Damon**, Friday, November 7, 2008 at 7:26pmjust like the one about salaries

m = change in seconds per year = (45.9-46.6)/(1990-1920) = -.01 seconds / year

so

R = -.01 *t + 46.6

check when t = 70 (that is 1990)

R = -.01(70) +46.6 = 45.9 check

b) t = 2003 - 1920 = 83

R = -.01(83) + 46.6 = 45.77

c) 45.7 = -.01 t + 46.6

t = 90 years

90 + 1920 = 2010

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