Question

Which equation represents a circle with a center at (2, –8) and a radius of 11?

A.(x – 8)2 + (y + 2)2 = 11
B.(x – 2)² + (y + 8)² = 121
C.(x + 2)² + (y – 8)² = 11
D.(x + 8)² + (y – 2)² = 121

Answer 1

the eqation with center at (h,k) and having a radius of r is
(x-h)²+(y-k)²=r²

given
cetner is (2,-8) and radius is 11

(x-2)²+(y-(-8))²=11²
(x-2)²+(y+8)²=121

B is answer