SOLUTION: In 1994, the life expectancy of males in a certain country was 65.9 years. In 1999, it was 68.5 years. Let E represent the life expectancy in year t and let t represent the number

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: In 1994, the life expectancy of males in a certain country was 65.9 years. In 1999, it was 68.5 years. Let E represent the life expectancy in year t and let t represent the number       Log On


   

Question 424152: In 1994, the life expectancy of males in a certain country was 65.9 years. In 1999, it was 68.5 years. Let E represent the life expectancy in year t and let t represent the number of years since 1994.
The linear function that fits the data is
E(t)= ___t + ____
Round to the nearest 10th.
Use the function to predict the life expectancy of males in 2003.
E(9)=
Round to the nearest 10th.
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
You are given 2 points on a straight line
The points are:
(0,65.9) and (5,68.5)
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The formula to use is:
+%28+E+-+65.9+%29+%2F+%28+t+-+0+%29+=+%2868.5+-+65.9+%29+%2F+%28+5+-+0+%29+
Multiply both sides by 5t
+5%2A%28+E+-+65.9+%29+=+t%2A%28+68.5+-+65.9+%29+
You'll have to finish- can't find calculator
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In 2003, t+=+9, then find E