ANSWER
c. 3
EXPLANATION
The given function is
[tex]y = - 3 \sin(x) [/tex]
This trigonometric sine function is of the form:
[tex]y = A \sin(Bx) [/tex]
The amplitude of this function is given by |A|
When we compare to the given function,
A=-3.
The amplitude is |-3|=3
The correct choice is C
