Calculate the Derivative of the Function $$f ( x ) = 5 x + 9 ; f ^ { \prime } ( 2 )$$

Multiple Choice

Calculate the derivative of the function. Then find the value of the derivative as specified.
- $$f ( x ) = 5 x + 9 ; f ^ { \prime } ( 2 )$$

A) $f ^ { \prime } ( x ) = 5 ; f ^ { \prime } ( 2 ) = 5$
B) $f ^ { \prime } ( x ) = 9 ; f ^ { \prime } ( 2 ) = 9$
C) $f ^ { \prime } ( x ) = 0 ; f ^ { \prime } ( 2 ) = 0$
D) $f ^ { \prime } ( x ) = 5 x ; f ^ { \prime } ( 2 ) = 10$