Concept explainers
In Exercises 17-26, it is useful to think of slope as representing the average rate of change of one variable corresponding to a change in the other variable .To keep the numbers you work with small, represent the first year for which you have data as year 0. For example, in Exercise 17, the year 2009 is year 0. In Exercise 24, the year 2010 is year 0.
Female life expectancy. According to the centers for Diseases control and prevention, the life expectancy of a female born in the United States in 2009 was 80.6 years and increasing at a rate of 0.1 year. Assume that this rate of increase remains constant (source: http://www.washingtonpost.com). Model this situation by a linear equation; use this equation to estimate the life expectancy of a female born in the United States in 2030.
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Chapter 7 Solutions
MYLAB W/ETEXT FOR MATHEMATICS ALL AROUN
- Does Table 1 represent a linear function? If so, finda linear equation that models the data.arrow_forwardWhen Date Are Unevenly speed. If data are evenly spaced, we need only calculate differences to see whether the data are linear. But if data are not evenly spaced, then we must calculate the average rate of change over each interval to see whether the data are linear. If the average rate of change is constant, it is the slope of the linear function. This fact is used in Exercises 23 and 24. In the following table, show that the average rate of change from 2 to 5 is not the same as the average rate of change from 5 to 6. This shows that the data are not linear, even though the differences in y are constant. x 1 2 5 6 y 3 6 9 12arrow_forward
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