Find the Phase Shift of the Function $$y = - 4 + 3 \sin \left( 4 x - \frac { \pi } { 2 } \right)$$

Multiple Choice

Find the phase shift of the function.
- $$y = - 4 + 3 \sin \left( 4 x - \frac { \pi } { 2 } \right)$$

A) $\frac { \pi } { 8 }$ units to the right
B) $\frac { \pi } { 6 }$ units to the right
C) $\frac { \pi } { 2 }$ units to the left
D) $\frac { \pi } { 8 }$ units to the left