Find the Slope of the Tangent Line to the Graph $f ( x ) = 7 x + 3$

Multiple Choice

Find the slope of the tangent line to the graph of the given function
$f ( x ) = 7 x + 3$ at the indicated point $( 1,10 )$ .

A) $f ^ { \prime } ( 1 ) = 1$
B) $f ^ { \prime } ( 1 ) = 7$
C) $f ^ { \prime } ( 1 ) = 10$
D) $f ^ { \prime } ( 1 ) = 13$
E) $f ^ { \prime } ( 1 ) = 4$