Find the Phase Shift of the Function $$y = 3 \cos \left( - 3 x - \frac { \pi } { 2 } \right)$$

Multiple Choice

Find the phase shift of the function.
- $$y = 3 \cos \left( - 3 x - \frac { \pi } { 2 } \right)$$

A) $\frac { \pi } { 2 }$ units to the left
B) $\frac { \pi } { 2 }$ units to the right
C) $\frac { \pi } { 6 }$ units to the right
D) $\frac { \pi } { 6 }$ units to the left