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

Explanation of Solution
Given:
|
|
10 | 29 |
20 | 82 |
30 | 151 |
40 | 235 |
50 | 330 |
60 | 430 |
70 | 546 |
80 | 669 |
90 | 797 |
The scatter plot of the data
Form Figure 1, it is noticed that the scatter plot of the data
(b)
To sketch: The scatter plots of “
(b)

Explanation of Solution
Given:
The data is listed as follows.
|
|
10 | 29 |
20 | 82 |
30 | 151 |
40 | 235 |
50 | 330 |
60 | 430 |
70 | 546 |
80 | 669 |
90 | 797 |
Calculation:
The table of
|
|
|
|
10 | 29 | 2.3025851 | 3.3672958 |
20 | 82 | 2.9957323 | 4.4067192 |
30 | 151 | 3.4011974 | 5.0172798 |
40 | 235 | 3.6888795 | 5.4595855 |
50 | 330 | 3.912023 | 5.7990927 |
60 | 430 | 4.0943446 | 6.0637852 |
70 | 546 | 4.2484952 | 6.302619 |
80 | 669 | 4.3820266 | 6.5057841 |
90 | 797 | 4.4998097 | 6.6808547 |
Use online graphing calculator and draw the scatter plot of “
From Figure 2, it is noticed that the scatter plot of “
In the same manner, use online graphing calculator and draw the scatter plot of “
From Figure 3, it is noticed that the scatter plot of “
(c)
To explain: The functions which are more appropriate for modeling of this data, exponential or power function.
(c)

Answer to Problem 10P
The power function is more appropriate for modeling of the given data.
Explanation of Solution
The form of the power function is
Take the
Here the natural log form of the power law
From the Figure 3, it is noticed that the scatter plot of “
Thus, the power function has the best fit of the data point.
(d)
To find: The appropriate function to model the data.
(d)

Answer to Problem 10P
The power function
Explanation of Solution
Given:
The data is listed below in table.
|
|
10 | 29 |
20 | 82 |
30 | 151 |
40 | 235 |
50 | 330 |
60 | 430 |
70 | 546 |
80 | 669 |
90 | 797 |
Calculation:
Use online graphing calculator and draw the graph of power function
From Figure 4, it is noticed that the power function
Therefore, the power model
Chapter 4 Solutions
Precalculus: Mathematics for Calculus - 6th Edition
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