
Concept explainers
The bar graph gives the life- expectancy for American men and women born in six selected years. In Exercises 89-90, you will use the data to obtain models for life expectancy and make predictions about how long American men and women will live in the future
.
Use the data for females shown in the bar graph at the bottom of the previous column to solve this exercise.
a. Let x represent the number of birth years after 1960 and let y represent female life expectancy. Create a
b. Draw a line through the two points that show female life expectancies for 1970 and 2000. Use the coordinates of these points to write a linear function that models life expectancy, E (x ), for American women born x years after 1960. Round the slope to two decimal places.
c. Use the function from part (b) to project the life expectancy of American women born in 2020.

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Chapter 1 Solutions
MyLab Math with Pearson eText -- Standalone Access Card -- for Precalculus (6th Edition)
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