AnswersCommon Core Algebra II - MA3111 B-ICModeling with Periodic Functions

Modeling with Periodic Functions Answers

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1
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The graph of these points follows a path resembling a .

A
cosine curve reflected across the y-axis
B
sine curve reflected across the y-axis
C
cosine curve reflected across the x-axis
D
sine curve reflected across the x-axis
4

so b = pi/12pi/6pi/3.

A
pi/12
B
pi/6
C
pi/3
7

Choose the equation of the graph

A
Option
B
Option
C
Option
D
Option
10

On a coordinate plane, a curve starts at (0, 10). It has a maximum of y = 16 and a minimum of y = negative 2.5. On a coordinate plane, a curve starts at (0, 10). It has a maximum of y = 18 and a minimum of y = 4. On a coordinate plane, a curve starts at (0, 10). It has a maximum of y = 15 and a minimum of y = 8. On a coordinate plane, a curve starts at (0, 10). It has a maximum of y = 18 and a minimum of y = 4.

Question illustration
A
Option
B
Option
C
Option
D
Option
11

Which situations can be modeled with a periodic function?

A
Option
B
Option
C
Option
12

a =

Answer:

6

14

Which periodic function, sine or cosine, would be a simpler model for the situation? Explain.

Answer:

A cosine function would be a simpler model for the situation. Since the low tide (minimum depth) occurs at t 0, a reflected cosine function can be used to model the data without needing a phase shift. Conversely, a sine function would require a phase shift to account for the starting position at the minimum.

15

This amplitude is meters. a = ⇒ -1.5

Answers:
Part 1:1.5
⇒ -1.5:1.5
17

The graph of these points follows a path resembling a .

A
cosine curve reflected across the y-axis
B
sine curve reflected across the y-axis
C
cosine curve reflected across the x-axis
D
sine curve reflected across the x-axis
20

On a coordinate plane, a curve starts at (0, 10). It has a maximum of y = 16 and a minimum of y = negative 2.5.

Question illustration
A
On a coordinate plane, a curve starts at (0, 10). It has a maximum of y = 16 and a minimum of y = negative 2.5.
Option A
B
On a coordinate plane, a curve starts at (0, 10). It has a maximum of y = 18 and a minimum of y = 4.
Option B
C
On a coordinate plane, a curve starts at (0, 10). It has a maximum of y = 15 and a minimum of y = 8.
Option C
D
On a coordinate plane, a curve starts at (0, 10). It has a maximum of y = 18 and a minimum of y = 4.
Option D

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