a.
Create a
a.
Answer to Problem 57E
Explanation of Solution
Given information:
The table shows the average sales
Create a scatter plot of the data.
Calculation:
Consider the, sales
Now use graphing utility
Go to STAT and select EDIT.
Enter the data in the line
Now go to STAT PLOT and choose PLOT1.
Select the first type,
Now, go to zoom and ZOOMSTAT.
Put ENTER and get the plot.
Hence the result is shown in graph.
b.
Find a trigonometric model that fits the data.
b.
Answer to Problem 57E
Explanation of Solution
Given information:
The table shows the average sales
Find a trigonometric model that fits the data. Graph the model with your scatter plot. How well does the model fit the data?
Calculation:
Consider the, sales
Now use graphing utility
Go to STAT and select CLAC.
Then go to the SinReg and go to VARS. And function data in the line
Now go to the ENTER.
Hence,the trigonometric model of SALES is,
Now graph the model in same viewing model , now go to
Now do not change the window as the WINDOW is adjusted to the scatter plot.
Now go to the GRAPH option.
Hence, the result shown in graph.
c.
What is the period of the model? Do you think it is reasonable given the context? Explain.
c.
Answer to Problem 57E
Explanation of Solution
Given information:
The table shows the average sales
What is the period of the model? Do you think it is reasonable given the context? Explain.
Calculation:
Find the period of the model consider the plot at
Now use graphing utility
Go to CLAC-I option put
Now go to TRACE option and find the point in which the function has the same value.
Hence, the period of the model is
d.
Interpret the meaning of the model’s amplitude in the context of the problem.
d.
Answer to Problem 57E
Explanation of Solution
Given information:
The table shows the average sales
Interpret the meaning of the model’s amplitude in the context of the problem.
Calculation:
Consider the model,
The wave equation is,
Hence, the amplitude is
Chapter 4 Solutions
EBK PRECALCULUS W/LIMITS
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