Decide Whether the Relation Is a Function $f ( - 2 )$

Multiple Choice

Decide whether the relation is a function.
-Find $f ( - 2 )$ when $f ( x ) = \frac { x ^ { 2 } - 2 } { x ^ { 3 } - 2 x }$ .

A) $- \frac { 1 } { 4 }$
B) $- \frac { 1 } { 2 }$
C) $- \frac { 1 } { 5 }$
D) - 1