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January 30, 2015

January 30, 2015

Posted by **Gayle** on Sunday, September 14, 2008 at 6:41pm.

In 1991, the life expectancy of males in a certain country was 62.3 years. In 1996, it was 65.1 years. Let E represent the life expectancy in years and t represent the number of years since 1991.

a. The linear function E(2) that fits the data is

E(t)=___t + ___ (round to the nearest tenth).

b. Use the function to predict the life expectancy of males in 2007. E(18)=____.

- Algebra -
**bobpursley**, Sunday, September 14, 2008 at 6:58pmThe slope is deltaE/deltaTime=2.8/5

E=2.8/5 * t + 62.3

where t is in years greater than 1991

- Algebra -
**Gayle**, Sunday, September 14, 2008 at 7:04pmThank you, I finally got the answer I needed after playing around with the original figures before writing the actual equation. I got E(t)=.56t+62.3 for the equation and E(18)=.56(18)+62.3=72.38 or 72.4....sound about right?

- Algebra -

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