Find the Phase Shift of the Function $$y = - 4 \sin \left( 4 x - \frac { \pi } { 2 } \right)$$

Multiple Choice

Find the phase shift of the function.
- $$y = - 4 \sin \left( 4 x - \frac { \pi } { 2 } \right)$$

A) $4 \pi$ units down
B) $4 \pi$ units up
C) $\frac { \pi } { 8 }$ units to the right
D) $\frac { \pi } { 2 }$ units to the left