Monday

April 21, 2014

April 21, 2014

Posted by **Jessie** on Saturday, May 7, 2011 at 2:12am.

- Math 116 -
**bobpursley**, Saturday, May 7, 2011 at 4:54amI know that model

life expectance= slope*time + constant is the math model here.

first thing, slope:

slope= changelifeexpatance/changetime

= (70.9-68.6)/(1996-1991)=2.3/5

life expectance= 2.3/5 * year + constant

now to find the constant:

life expectancey= 2.3/5 *t + constant where t= (year-1991)

70.9=2.3/5* 5 + constant

solving for constant,

70.9=2.3 + constant

constant= 70.9-2.3=68.6

amazing, so now you have

lifeexpectancey=2.3/5 * t+68.6 where t is the years since 1991

- Math 116 -
**Jessie**, Saturday, May 7, 2011 at 2:12pmthank u

**Related Questions**

math - In 1991, the life expectancy of males in a certain country was 70.4 years...

algebra - in 1991 the life expectancy of males in a certain country was 68.2 ...

Aleg - In 1991, the life expectancy of males in a certain company was 68.2 years...

Algebra - In 1991, the life expectancy of males in a certain country was 72.6 ...

ALGEBRA - In 1991, the life expectancy of males in a certain company was 68.2 ...

Algebra - I'm a bit stuck trying to figure out what this problem wants, can ...

Math 117 - In 1991 the life expectancy of males in a certain country was 73.7 ...

math - in 1991 the life expectancy of males in a certain country was 73.7 years ...

Algebra - In 1991, the life expectancy of males in a certain country was 70.8 ...

math 116 - In 1991, the life expectancy of males in a certain country was 72.8 ...