
Concept explainers
a.
To write an equation representing the cost of each friend as a function of how many friends give.
a.

Answer to Problem 6CYU
The required function is
Explanation of Solution
Given information:
The given statement is:
“A group of friends plans to get their youth group leader a gift certificate for a day at a spa. The certificate costs
The cost of each friend is
The equation representing the cost of each friend as a function of how many friends give can be written as:
Hence, the required function is
b.
To graph the function and state the domain and range.
b.

Explanation of Solution
Given information:
The given function is:
Graph:
This represents a transformation of the graph of
The graph of the function is:
Interpretation:
The domain of the graph is all real numbers not equal to
c.
To explain any limitations to the range or domain in this situation.
c.

Answer to Problem 6CYU
In this situation, the domain and range are limited to all the positive numbers (greater than zero) because the negative numbers will not make sense.
Explanation of Solution
Given information:
The given statement is:
“A group of friends plans to get their youth group leader a gift certificate for a day at a spa. The certificate costs
The function is
In this situation, the domain and range are limited to all the positive numbers (greater than zero) because the negative numbers will not make sense.
Chapter 9 Solutions
Algebra 2
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