
Concept explainers
(a)
To find: The
(a)

Explanation of Solution
Given:
The given table is,
Calculation:
The scatter plot for the given table is shown in Figure 1
Figure 1
(b)
To find: The quadratic model for the plot.
(b)

Answer to Problem 86E
The expression for the quadratic model is
Explanation of Solution
From the feature of the graphing utility the expression for the quadratic model of the given data is,
(c)
To find: The plot of the model on the scatter plot.
(c)

Answer to Problem 86E
The required plot is shown in Figure 2 and the model follows the plot very closely,
Explanation of Solution
Given:
The required model of the
Calculation:
The plot of the model
Figure 2
The line of the model follows the plots as shown in above Figure.
(d)
To find: The year in which the sales value is maximum.
(d)

Answer to Problem 86E
The year
Explanation of Solution
From the use of the graphing utility the year in which the graphing utility is maximum is shown in Figure 1 and is
(e)
To find: The year that has the maximum sales value.
(e)

Answer to Problem 86E
The maximum sales value is in the year
Explanation of Solution
The maximum value attained algebraically is,
Then,
The maximum sales value is,
(f)
To find: The prediction for the sales in the year
(f)

Answer to Problem 86E
The sales for the year
Explanation of Solution
Given:
The given year is
Calculation:
Consider the sales for the year
Chapter 2 Solutions
Precalculus with Limits
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