# math

posted by .

in 1991 the life expectancy of males in a certain country was 73.7 years in 1997 it was 76.9 years let E represent the life expectancy in year T and let T represent the number of years since 1991

the Linear function E (T) that fits the data is E(t)=_____T+______

use the function to predict the life expectancy of males in 2008
E(17)=___________________
round to the nearest tenth

• math -

At T=0, which is when we're in 1991, we want E(0)=73.7.

The slope in front of T is found as follow :

(76.9 - 73.7) divided by (1997-1991)

= 0.53333~ = 8/15

This mean thay the life expectancy would increase by 8/15th of a year every year.

In short, E(T) = 8/15 x T + 73.7

And E(17) = 8/15 x 17 + 73.7 which you can calculate.

• math -

close, but not quite.

## Similar Questions

1. ### Algebra

I'm a bit stuck trying to figure out what this problem wants, can anyone help?
2. ### Math 117

In 1991 the life expectancy of males in a certain country was 73.7 years old, In 19951995 it was 77.4 years. Let E represent the life expectancy in year (t) and let (t) represent the number of years since 1991 What is the linear function …
3. ### ALGEBRA

In 1991, the life expectancy of males in a certain company was 68.2 years. In 1997, it was 70.7 years. Let E represent the life expectancy in year t and let t represent the number of years since 1991. 1) The linear function E(t) that …
4. ### Aleg

In 1991, the life expectancy of males in a certain company was 68.2 years. In 1997, it was 70.7 years. Let E represent the life expectancy in year t and let t represent the number of years since 1991. 1) The linear function E(t) that …
5. ### math

In 1991, the life expectancy of males in a certain country was 70.4 years. In 1996, it was 72.9 years. Let E represent the life expectancy in year t and let t represent the number of years since 1991. What is the linear function E(t) …
6. ### Math 116

in 1991 the life expectancy of males in certain county was 68.6 years in 1996 it was 70.9 years let t represent the life expectancy in year t and let t represent the number of years since 1991
7. ### algebra

in 1991 the life expectancy of males in a certain country was 68.2 years. in 1995 it was 70.8 years. let e represent the life expectancy in year t and let t represent the number of years since 1991
8. ### Algebra

In 1991, the life expectancy of males in a certain country was 72.6 years. In 1996, it was 74.7 years. Let E represent the life expectancy in year t and represent the number of years since 1991. The linear function E(t) that fits that …
9. ### Algebra

In 1991, the life expectancy of males in a certain country was 70.8 years. In 1995, it was 74.6 years. Let E represent the life expectancy in year t and let t represent the number of years since 1991.. The linear function E(t) that …
10. ### Algebra

In 1991, the life expectancy of males in a certain country was 67.2 years. In 1995, it was 71.1 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 …

More Similar Questions