
Concept explainers
a.
Does the
a.

Answer to Problem 3P
Explanation of Solution
Given information:
The U.S. health-care expenditures for
Does the scatter plot shown suggest an exponential model?
Calculation:
The U.S. health-care expenditures for
The scatter plot appears to be an upward growth, increasing rapidly.
This is an
Hence, the solution is,
b.
Make a table of the values
b.

Answer to Problem 3P
The scatter plot appears to be linear.
Explanation of Solution
Given information:
The U.S. health-care expenditures for
Make a table of the values
Calculation:
Make a table of the values
Press
Press
Press the button window and set the range of
The scatter plot appears to be linear.
Hence, The scatter plot appears to be linear .
c.
Find the regression line for the data in part (b).
c.

Answer to Problem 3P
Explanation of Solution
Given information:
The U.S. health-care expenditures for
Find the regression line for the data in part (b).
Calculation:
To find the regression line for the data Press
Press
Hence, the regression line for the data is,
d.
To find an exponential model for the growth of health-care expenditures.
d.

Answer to Problem 3P
Explanation of Solution
Given information:
The U.S. health-care expenditures for
Use the results of part (c) to find an exponential model for the growth of health-care expenditures.
Calculation:
Find an exponential model for the growth of health-care expenditures.
Now,
Hence, an exponential model for the growth is,
e.
To find an exponential model for the growth of health-care expenditures.
e.

Answer to Problem 3P
Explanation of Solution
Given information:
The U.S. health-care expenditures for
Use your model to predict the total health-care expenditures in
Calculation:
Exponential model for the growth of health-care expenditures.
Put
Hence, the total health-care expenditures in
Chapter 4 Solutions
Precalculus: Mathematics for Calculus - 6th Edition
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