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SAT Math Practice Question #12576 - SATify | SATify

#12576

coordinate geometry

circles

geometry

medium

25 sec

A circle in the $x y$ -plane has the equation $(x + 2)^{2} + (y - 9)^{2} = 81$ . Which of the following gives the center of the circle and its radius?

A.

The center is at $(2, 9)$ and the radius is 9.

B.

The center is at $(- 2, - 9)$ and the radius is 9.

C.

The center is at $(- 2, 9)$ and the radius is 9.

D.

The center is at $(2, - 9)$ and the radius is 9.