The Slope of the Tangent Line to the Graph $f ( x ) = 3 \sqrt { x }$

Multiple Choice

The slope of the tangent line to the graph $f ( x ) = 3 \sqrt { x }$ at the point (4,6) is

A) $- \frac { 3 } { 4 }$
B) $\frac { 3 } { 4 }$
C) $- \frac { 4 } { 3 }$
D) $\frac { 4 } { 3 }$
E) $\frac { 3 } { 2 }$