Find the Center and Radius of the Circle $$x ^ { 2 } + y ^ { 2 } - 2 x + 6 y - 6 = 0$$

Multiple Choice

Find the center and radius of the circle.
- $$x ^ { 2 } + y ^ { 2 } - 2 x + 6 y - 6 = 0$$

A) center: (-3, 1) ; radius: 4
B) center: (3, -1) ; radius: 16
C) center: (-1, 3) ; radius: 16
D) center: (1, -3) ; radius: 4