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School
Golden West College *
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Course
G115
Subject
Mathematics
Date
Jun 13, 2024
Type
Pages
3
Uploaded by CoachAtomBear32
Date:
June 11, 2024
School:
MSHS
Facilitator:
Posey
7.06 Modeling with Graphs of Trig Functions (30
points)
Enter the following data into GeoGebra. This data represents the average length of daylight for Atlanta, GA
over a twelve month period in 2012.
1.
Click on the full screen button
in the bottom right-hand corner of the spreadsheet area.
2.
Enter the
Month
data into column A on the spreadsheet and the
Length of Daylight
data into column B
on the spreadsheet.
3.
Using your mouse, highlight the data. Right-click and select
Create
>>
List of Points
.
4.
Use the sliders to manipulate the dotted sine curve to fit the plot.
Month
Length of Daylight
1
612
2
659.93
3
720
4
783
5
835
6
862
7
848
8
802
9
742
10
679
11
625
12
597.19
1.
What is the unit of measurement for length of daylight?
Total amt of minutes
2.
What is the average length (in hours) of daylight during October?
11.32
3.
What is the equation for the sine graph from GeoGebra?
y
=
727.78+130.89sin(0.51x-1.59)
4.
Determine the equation of the midline.
y
=
729.595
5.
What is the period of the graph?
12 months
6.
Determine the amplitude of the graph.
130.89
7.
Estimate the length of daylight for month 16. Express your answer in minutes and hours.
Minutes:
770.83
Hours:
12.85
8.
Copy and paste your graph below. You will need to right-click and select “copy to clipboard” and then
“paste” the graph into this document.
© ACCESS Virtual Learning 2021
Input the following data into GeoGebra. This data represents the average length of daylight (in minutes) for a
city in Iceland.
Month
Length of Daylight
1
337.39
2
517.21
3
709.55
4
909.27
5
1108.68
6
1224.43
7
1170.61
8
976.48
9
778.70
10
582.74
11
390.10
12
364.10
9.
What is the unit of measurement for length of daylight?
Total amt minutes
10. What is the average length (in hours) of daylight during September?
12.987
11. What is the equation for the sine graph from GeoGebra?
y
=
776,1851+426.1764sin (.55502x-y1.825)
12. Determine the equation of the midline.
y
=
7776,1851
13. What is the period of the graph?
12 months
14. Determine the amplitude of the graph.
426.1764
15. Estimate the length of daylight for month 14. Express your answer in minutes and hours.
© ACCESS Virtual Learning 2021
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