Find the Center (H, K) and Radius R of the Circle

Multiple Choice

Find the center (h, k) and radius r of the circle with the given equation.
- $$x ^ { 2 } + y ^ { 2 } + 18 x - 8 y + 97 = 16$$

A) $( \mathrm { h } , \mathrm { k } ) = ( 9 , - 4 ) ; \mathrm { r } = 16$
B) $( \mathrm { h } , \mathrm { k } ) = ( 4 , - 9 ) ; \mathrm { r } = 4$
C) $( h , k ) = ( - 4,9 ) ; r = 16$
D) $( h , k ) = ( - 9,4 ) ; r = 4$