y (population) 3500 3000 2500 2000 Hares 1500 1000 Lynx 500 B (D) 50 100 150 200 (weeks) Figure 1 The graphs in Figure 1 are sine curves that have been shifted upward, so they are graphs of functions of the form y = a sin k(t – b) + c Here c is the amount by which the sine curve has been shifted vertically. Note that c is the average value of the function, halfway between the highest and lowest values on the graph. The amplitude | a | is the amount by which the graph varies above and below the average value (see Figure 2).

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.3: The Addition And Subtraction Formulas
Problem 78E
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Question

Can you find this equation given the graph

(population)
3500 -
3000
2500
2000
Hares
1500
1000
Lynx
500
(B)
D
50
100
150
200
(weeks)
Figure 1
The graphs in Figure 1 are sine curves that have been shifted upward, so they are graphs of functions of the
form
y = a sin k(t – b) + c
Here c is the amount by which the sine curve has been shifted vertically. Note that c is the average value of the
function, halfway between the highest and lowest values on the graph. The amplitude | a | is the amount by
which the graph varies above and below the average value (see Figure 2).
Transcribed Image Text:(population) 3500 - 3000 2500 2000 Hares 1500 1000 Lynx 500 (B) D 50 100 150 200 (weeks) Figure 1 The graphs in Figure 1 are sine curves that have been shifted upward, so they are graphs of functions of the form y = a sin k(t – b) + c Here c is the amount by which the sine curve has been shifted vertically. Note that c is the average value of the function, halfway between the highest and lowest values on the graph. The amplitude | a | is the amount by which the graph varies above and below the average value (see Figure 2).
Period
k
c + |a|+
Phase
shift
b
Average
value c
Amplitude |a|
c - |a|-
=
b+ 27
t
b +
k
k
Figure 2
y = a sin k(t – b) + c
1. Find functions of the form y = a sin k(t – b) + c that model the lynx and hare populations graphed in
Figure 1. Graph both functions on your calculator and compare to Figure 1 to verify that your functions are the
right ones.
Transcribed Image Text:Period k c + |a|+ Phase shift b Average value c Amplitude |a| c - |a|- = b+ 27 t b + k k Figure 2 y = a sin k(t – b) + c 1. Find functions of the form y = a sin k(t – b) + c that model the lynx and hare populations graphed in Figure 1. Graph both functions on your calculator and compare to Figure 1 to verify that your functions are the right ones.
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