SOLUTION: In 1990, the life expectancy of males in a certain country was 66.3 years. In 1997, it was 70.0 years. Let E represent the life expectancy in years t and let t represent the numb
Algebra.Com
Question 230356: In 1990, the life expectancy of males in a certain country was 66.3 years. In 1997, it was 70.0 years. Let E represent the life expectancy in years t and let t represent the number of years since 1990. E(t)= ___t +____ round to the nearest tenth. Use the fuction to predict life expectancy of males in 2009. E (19) =______ round to the nearest tenth. I'm sorry I tried and I can not get this problem
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
In 1990, the life expectancy of males in a certain country was 66.3 years.
In 1997, it was 70.0 years.
Let E represent the life expectancy in years t and let t represent the number
of years since 1990. E(t)= ___t +____ round to the nearest tenth.
Use the function to predict life expectancy of males in 2009
:
:
Find the slope
In 1990; x1=0 and y1=66.3
In 1997; x2=7 and y2=70
:
Find the slope (m) using the slope equation: m =
m = = = .53
:
Use the point/slope formula to write the equation; y - y1 = m(x - x1)
y - 66.3 = .53(x - 0)
y = .53x + 66.3
:
therefore:
The Linear function E(t) that fits the data is.
E(t)= .53t + 66.3
:
Use the Function to predict the life expectancy of males in 2009.
This means t=19; substitute 19 for t in the equation
E(19)= .53(19) + 66.3
E(19)= 10 + 66.3
E(19)= 76.3 yrs is the life expectancy in 2009
RELATED QUESTIONS
in 1992 the life expectancy of males in a certain country was 72.1 years. In 1997 it was... (answered by ankor@dixie-net.com)
In 1992 the life expectancy of males in a certain country was 66.2 years in 1997 it was... (answered by drk)
In 1990, the life expectancy of males in a certain country was 62.1 years,1996 it was... (answered by stanbon)
In 1990, the life expectancy of males in a certain country was 70.2 years. In 1997, it... (answered by mananth)
I have no Idea were to start with this problem, can you please help with this function?... (answered by stanbon)
in 1990, the life expectancy of males in a certain country was 72.4 years. In 1994, it... (answered by Edwin McCravy)
In 1992, the life expectancy of males in a certain country was 66.4 years. In 1996, it... (answered by stanbon)
In 1995, the life expectancy of males in a certain country was 72.3 years. In 2001, it... (answered by stanbon)
In 1990 the life expectancy of males in a certain country was 65.4 years. In 1996, it... (answered by josmiceli)