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Concept explainers
a.
Does the relation defined by the set of order pairs
a.
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Answer to Problem 22AYU
It is not a function.
Explanation of Solution
Given information:
A marketing firm wishes to find a function that relates the sales
Does the relation defined by the set of order pairs
Calculation:
Consider the table,
No, the relation defined by the set of order pairs
Because a function cannot have two values at same input, that is for every
Hence it is not a function.
b.
Draw a
b.
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Answer to Problem 22AYU
Explanation of Solution
Given information:
A marketing firm wishes to find a function that relates the sales
Draw a scatter diagram of the data.
Calculation:
A scatter diagram of the data of the data is,
Hence, the scatter plot is shown in graph.
c.
Use a graphing utility to find the line of best fit that models the relation between price quantity demanded.
c.
![Check Mark](/static/check-mark.png)
Answer to Problem 22AYU
Explanation of Solution
Given information:
A marketing firm wishes to find a function that relates the sales
Use a graphing utility to find the line of best fit that models the relation between advertising and sales.
Calculation:
Using a graphing utility to find the line of best fit that models the relation between advertising and sales,
Hence, the line of best fit
d.
Interpret the slope.
d.
![Check Mark](/static/check-mark.png)
Answer to Problem 22AYU
Explanation of Solution
Given information:
A marketing firm wishes to find a function that relates the sales
Interpret the slope.
Calculation:
The slope of the line is
Hence, slope of line is
f.
What is the domain of the function?
f.
![Check Mark](/static/check-mark.png)
Answer to Problem 22AYU
Explanation of Solution
Given information:
A marketing firm wishes to find a function that relates the sales
What is the domain of the function?
Calculation:
The domain of
That is the domain of the function consists of the set of
Thus, the domain of the given relation is
Hence, domain of the function is
Chapter 3 Solutions
Precalculus Enhanced with Graphing Utilities
Additional Math Textbook Solutions
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