SOLUTION: In 1993, the life expectancy of males in a certain country was 67.7 years. In 2000, it was 66.5 years. Let E represent the life expectancy in year t and let t represent the numbe

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Question 573281: In 1993, the life expectancy of males in a certain country was 67.7 years. In 2000, it was 66.5 years. Let E represent the life expectancy in year t and let t represent the number of years since 1993.
I have tried for a whole day using formulas from others that were similiar and plugging the numbers in but I can not figure it out. Please help. It will be much appreciated
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
from 1993 to 2000 the life expectancy decreased from 67.7 to 66.5

this change of -1.2yr per 7 yrs would be the slope of a linear graph

E = (-1.2/7)t + 67.7