Find the Slope $m \text { of the line tangent to the graph of the function } f ( x ) = 2 - 7 x \text { at the }$

Multiple Choice

Find the slope $m \text { of the line tangent to the graph of the function } f ( x ) = 2 - 7 x \text { at the }$ point $( - 1,9 )$

A) $m = - 7$
B) $m = - 2$
C) $m = 2$
D) $m = 7$
E) $m = - 9$