Find the Eccentricity $e$ Of the Hyperbola $$x ^ { 2 } - y ^ { 2 } = 49$$

Find the eccentricity $e$ of the hyperbola.
- $$x ^ { 2 } - y ^ { 2 } = 49$$

A) $\sqrt { 2 }$
B) $\sqrt { 7 }$
C) 0
D) 1