Question

1. find the amplitude of $y = -4\sin(2x + \pi)$.

a) -4 b) 4 c) 2 d) $\pi$ e) -2

Explanation:

Step1: Recall amplitude definition

Amplitude is $|A|$ for $y=A\sin(Bx+C)$

Step2: Identify $A$ and compute

$A=-4$, so amplitude is $|-4|=4$

Answer:

b) 4