The Slope of the Tangent Line to the Graph $f ( x ) = \frac { 1 } { x ^ { 2 } }$

Multiple Choice

The slope of the tangent line to the graph $f ( x ) = \frac { 1 } { x ^ { 2 } }$ at the point (-1,1) is

A) -3
B) -2
C) -1
D) 1
E) 2