SOLUTION: This problem with linear functions is getting me confused, can you help me please? I appreciate it. In 1991, the life expectancy of males in a certain country was 66.3 years. In

Question 206213: This problem with linear functions is getting me confused, can you help me please? I appreciate it.
In 1991, the life expectancy of males in a certain country was 66.3 years. In 1995, it was 68.9 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 + ____ (round to the nearest tenth)
Use the function to predict the life expectancy of males in 2008. E(17)=___
(round to the nearest tenth)
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
In 1991, the life expectancy of males in a certain country was 66.3 years. In 1995, it was 68.9 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 + ____ (round to the nearest tenth)
Use the function to predict the life expectancy of males in 2008. E(17)=___
---------------------
You have two points relating year and life expectancy: (0,66.3) and (4,68.9)
slope: (68.9-66.3)/4 = 0.65
intercept: E(0) = 66.3
-------------------------------
Equation: E(t)=0.65t+66.3
---
E(17) = 0.65*17+66.3 = 77.35
====================================
Cheers,
Stan H.
RELATED QUESTIONS
Can you please help me with this story problem that I am struggling with. In 1991 the... (answered by ankor@dixie-net.com)

In 1991 the life expentancy of males were in a certain country was 68.5 years. In 1996... (answered by marcsam823)

In 1991, the life expectancy of males in a certain country was 68.5 years. In 1996 it was (answered by oscargut)

Could you please help me get started with this problem? Recycled 38 in 1990, 45 in 1991,... (answered by checkley77)

I can not figure this out. Please help me, I just can not get word problems correct.... (answered by stanbon)

This problem is one of my biggest problems that I do not no how to figure out will... (answered by stanbon)

9{[5(c-4)+15]-[3(5c-2)+4]}= I have been working on problems lke this one for the last... (answered by arallie)

please help me with this problem. im getting confused. and i really need ur help.... (answered by jim_thompson5910)

Solve and Check 3[x-(2-x)-2x]=3(4-x). Im getting confused on what operation to... (answered by rfer,jim_thompson5910)