Question 359483
In 1990 the life expectancy of males in a certain country was 62.6 years.  In 1994 it was 64.7.  let E represent the life expectancy in year t and let t represent the number of years since 1990.


from 1990 to 1994 the life expectancy increased by 64.7-62.6= 2.1
4 years 2.1
1 year 2.1/4 = 0.52

The linear function e(t) that fits the data is
E(t)= 0.52t +62.6
(round to the nearest tenth.
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m.ananth@hotmail.ca