Concept explainers
a.
Does the relation defined by the set of order pairs
a.
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.
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.
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.
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.
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
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