Answer
amplitude$=\frac{3}{2}$, period$ =\frac{\pi}{3}$, and phase shift$ =-\frac{\pi}{2}$.
See graph.
Work Step by Step
1. Given $y=\frac{3}{2}cos(6x+3\pi)$, we can find the amplitude$=\frac{3}{2}$, period$=\frac{2\pi}{6}=\frac{\pi}{3}$, and phase shift$=-\frac{3\pi}{6}=-\frac{\pi}{2}$.
2. See graph.
