Concept explainers
(a)
To Find: The independent variable and dependent variable and explain what they represent in the problem.
(a)
Answer to Problem 79E
Independent:
Dependent:
Explanation of Solution
Given: The mathematical model represents the data
Independent:
Dependent:
(b)
To Find: The approximate the total number of miles for all public roadways each year from
(b)
Answer to Problem 79E
Explanation of Solution
Given: The mathematical model represents the data
To approximate the total number of miles for all public roadways each year from
Plug the values in the mathematical model
We get
(c)
To Compare: The values in part (a) with the actual values in the bar graph. How well does the model fit the data?
(c)
Answer to Problem 79E
The data is exactly same
Explanation of Solution
Given: The mathematical model represents the data
The data is exactly same.
(d)
To Explain: Do you think the
(d)
Answer to Problem 79E
Yes
Explanation of Solution
Given: The mathematical model represents the data
Yes, piecewise defined function could be used to predict the total number of miles for all public roadways for years outside the domain.
Chapter 1 Solutions
Precalculus with Limits: A Graphing Approach
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