Question

A circle is centered at (−4, −6) and has a radius of 3. Which of the following is the equation for this circle?

a. (x + 4)2 + (y + 6)2 = 3


b. (x − 4)2 + (y − 6)2 = 9


c. (x − 4)2 + (y − 6)2 = 3


d. (x + 4)2 + (y + 6)2 = 9

Answer 1

eq. of circle
\[\left( x-h \right)^2+\left( y-k \right)^2=r^2\]
where (h,k) is the center and r be the radius of the circle.