SOLUTION: in 1992 the life expectancy of males in a certain country was 72.1 years. In 1997 it was 74.4 years. Let E represent the life expectancy in year t and let t represent the number of

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Question 229521: in 1992 the life expectancy of males in a certain country was 72.1 years. In 1997 it was 74.4 years. Let E represent the life expectancy in year t and let t represent the number of years since 1992.
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
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In 1992 the life expectancy of males in a certain country was 72.1 years.
In 1997 it was 74.4 years.
Let E represent the life expectancy in year t and let t represent the number of years since 1992.
:
Find the slope
In 1992; x1=0 and y1=72.1
In 1997; x2=5 and y2=74.4
:
Find the slope (m) using the slope equation: m = %28y2-y1%29%2F%28x2-x1%29
m = %2874.4-72.1%29%2F%285+-+0%29%29 = %282.3%29%2F%285%29 = .46
therefore:
The Linear function E(t) that fits the data is.
E(t)= .46t + 72.1
: