
(a)
To Find: The independent variable and dependent variable and explain what they represent in the problem.
(a)

Answer to Problem 78E
Independent:
Dependent:
Explanation of Solution
Given: The table show revenue
The mathematical model represents the data
Independent:
Dependent:
The
And
(b)
To Find: The domain of each part of the
(b)

Answer to Problem 78E
Explanation of Solution
Given: The table show revenue
The mathematical model represents the data
Given:
The domain of the first function is
The domain of the second function is
(c)
To Find:
(c)

Answer to Problem 78E
Explanation of Solution
Given: The table show revenue
The mathematical model represents the data
Given:
To find
Month
Substitute
Since numbers are represents in thousands
Thus
The total revenue in the month of May is
(d)
To Find:
(d)

Answer to Problem 78E
Explanation of Solution
Given: The table show revenue
The mathematical model represents the data
Given:
To find
Month
Substitute
Since numbers are represents in thousands
Thus
The total revenue in the month of November is
(e)
To Explain: How do the values obtained from the models in parts (c) and (d) compare the actual data values.
(e)

Answer to Problem 78E
Almost same
Explanation of Solution
Given: The table show revenue
The mathematical model represents the data
They are almost exactly the same.
Chapter 1 Solutions
Precalculus with Limits: A Graphing Approach
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