SOLUTION: I just can't figure this out... please help :)
In 1990, the life expectancy of males in a certain country was 64.4 years. In 1995, it was 66.9 years. Let E represent the life e
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Question 552624: I just can't figure this out... please help :)
In 1990, the life expectancy of males in a certain country was 64.4 years. In 1995, it was 66.9 years. Let E represent the life expectancy in year t and let t represent the number of years since 1990.
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 2005.
E(15)=____
(round to the nearest tenth)
Im at a loss.... Thank you in advance for your help!!!
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
You are given data for two ordered pairs, \right))
, and are told that this is a linear relationship.
for 1990, 
, and for 1995, 
. So your two ordered pairs are )
and )
Use the two-point form of an equation of a line:
(x\ -\ x_1) )
where )
and )
are the coordinates of the given points.
Then put the result into slope intercept form: 
For the second part of your problem, calculate the value of 
that represents the year 2005. Hint: Subtract 1990 from 2005. Then substitute that value of into your equation and do the arithmetic.
John
My calculator said it, I believe it, that settles it
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