Question

Which is an equation of the circle with a radius of 9 units and center at
(–4, 2)?
(x − 9)2 + (y + 4)2 = 4
(x − 4)2 + (y + 2)2 = 81
(x + 4)2 + (y − 2)2 = 81
(x − 2)2 + (y + 4)2 = 81

Answer 1

` ( x-h )² + ( y-k )²= r² ` (h, k) is the center. r is the radius.

Answer 2

so c?