SOLUTION: In 1990, the life expectancy of males in a certain country was 70.2 years. In 1997, it was 72.7 years...? Let E represent the life expectancy in year t and let t represent the n

Question 481073: In 1990, the life expectancy of males in a certain country was 70.2 years. In 1997, it was 72.7 years...?
Let E represent the life expectancy in year t and let t represent the number of years since 1990.
The linear function E(t) that fits the data is
E(t)=__t + ___. (round to the nearest tenth)

Use the function to predict the life expenctancy of males in 2008.
E(13)=___. (round to the nearest tenth
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
year
1990 70.2 years
1997 72.7 years
Difference
7 2.5
Increase in life expectancy per year = 2.5 / 7 = 0.36

E(t)= 70.2 + 0.357 t

2008 t= 18

E(t)= 70.2 + 0.357 * 18

In 2008 --K (18)= 76.63 years
K ( 13 )= 74.84 years
m.ananth@hotmail.ca

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