Math 116

posted by .

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

  • Math 116 -

    I 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 -

    thank u

Respond to this Question

First Name
School Subject
Your Answer

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 116

    In 1991, the life expectancy of males in a certain country was 72.8 years. In 1995, it was 75.9 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 …
  6. 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) …
  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. math

    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 …
  9. 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 …
  10. 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 …

More Similar Questions