# Algebra

I'm a bit stuck trying to figure out what this problem wants, can anyone help?
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)=____.

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1. The slope is deltaE/deltaTime=2.8/5

E=2.8/5 * t + 62.3
where t is in years greater than 1991

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2. Thank 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?

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posted by Gayle

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