Question

Which is an equation of a circle with center (2, −10) and radius 3
(x − 2)2 + (y + 10)2 = 9
(x + 10)2 + (y − 2)2 = 9
(x − 2)2 + (y + 10)2 = 3
(x + 2)2 + (y − 10)2 = 3

Answer 1

(x - a)^2 + (y - b)^2 = r^2 is a circle with centre at (a, b) and radius of r
The correct answer is (x - 2)^2 + (y + 10)^2 = 9 ie the first one