Differentiate the Function and Find the Slope of the Tangent $$f ( x ) = 7 x + \frac { 3 } { x } , x = 9$$

Multiple Choice

Differentiate the function and find the slope of the tangent line at the given value of the independent variable.
- $$f ( x ) = 7 x + \frac { 3 } { x } , x = 9$$

A) $\frac { 188 } { 27 }$
B) $\frac { 190 } { 27 }$
C) $\frac { 190 } { 3 }$
D) $\frac { 188 } { 3 }$