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Answer:
A
m
p
l
i
t
u
d
e
=
4
,
Period
=
3
π
Explanation:
Standard form of a sinusoidal function is
y
=
A
sin
(
B
x
−
C
)
+
D
Given
y
=
−
4
sin
(
2
3
x
)
A
=
−
4
,
B
=
2
3
,
C
=
D
=
0
A
m
p
l
i
t
u
d
e
=
|
A
|
=
|
−
4
|
=
4
P
e
r
i
o
d
'
=
2
π
|
B
|
=
2
π
2
3
=
3
π
Phase Shift
=
(
−
C
B
)
=
0
Vertical Shift
=
D
=
0
graph{-4 sin(2/3 x) [-10, 10, -5, 5]}
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