SOLUTION: In 1995, the life expectancy of males in a certain country was 66.9 years. In 2002, it was 69.7 years. Let E represent the life expectancy in year t and let t represent the number

Question 135867: In 1995, the life expectancy of males in a certain country was 66.9 years. In 2002, it was 69.7 years. Let E represent the life expectancy in year t and let t represent the number of years since 1995.
Find a linear function E(t) that fits the data.
E(t)= ?t+?
HELP PLEASE!!!
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
In 1995, the life expectancy of males in a certain country was 66.9 years. In 2002, it was 69.7 years. Let E represent the life expectancy in year t and let t represent the number of years since 1995.
Find a linear function E(t) that fits the data.
---------------------------------
You have two points: (0,66.9) and (7,69.7)
slope = (69.7-66.9)/7 = 2/5
---------------------------
Form E = mt+b
You have y,x,and m; solve for "b":
66.9 = (2/5)(0)+b
b = 66.9
EQUATION:
E(t) = (2/5)t +66.9
Cheers,
Stan H.

RELATED QUESTIONS
In 1995, the life expectancy of males in a certain country was 72.3 years. In 2001, it... (answered by stanbon)

Can you help me figure out how to do this? In 1995, the life expectancy of males in a... (answered by mananth)

For males certain country in the year 1995. life expectancy was years. For males born the (answered by greenestamps)

Hello, Im stuck can i please have some help. Thank you, kindly! In 1995 the Life... (answered by nerdybill)

In 1995, the life expectancy of males in a certain country was 73.8 years. In 2001, it... (answered by stanbon)

In 1992, the life expectancy of males in a certain country was 66.4 years. In 1996, it... (answered by stanbon)

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 1995 the life expectancy of males in a certain country was 64.7 years. In 2000, it was (answered by ewatrrr)