Use the Limit Process to Find the Slope of the Graph

Multiple Choice

Use the limit process to find the slope of the graph of the following function at the point $( 3 , - 19 )$ .
$$g ( x ) = - 10 - 3 x$$

A) $- 13$
B) $- 19$
C) $- 7$
D) $- 3$
E) 3