Chapter 6 - The Circular Functions and Their Graphs - 6.4 Translations of the Graphs of the Sine and Cosine Functions - 6.4 Exercises - Page 613: 19

B. Amplitude=3, Period=$\pi$, Phase shift=2.

Comparing $y=3\sin(2x-4)$ to $y=A\sin(\omega x-\phi)$, note that $A=3$, $\omega=2$, and $\phi=4$. Amplitude=$|A|=3$ Period $T=\frac{2\pi}{\omega}=\frac{2\pi}{2}=\pi$ and Phase shift = $\frac{\phi}{\omega}=\frac{4}{2}=2$ So the correct match is option B.