Question

The center of the circle is at (-3,1) and it's radius is 9. What is the equation of the circle?

Answer 1

(x+3)^2+(y-1)^2=18
x and y always lie and you must square 9

Answer 2

The answer is 1 or A.

$(x-h)^{2}+ (y-k)^{2}= r^{2}$

$(x+3)^{2}+ (y-1)^{2}=81$