Answer
See graph (red).
Work Step by Step
To graph $y=3sin(2x+\pi)$, start from one period of $y=sin(x)$, compress horizontally by a factor of 1/2, shift $\frac{\pi}{2}$ to the left, then stretch vertically by a factor of 3. Repeat the resulting curve horizontally to cover the window. See graph (red).
