Find the center and radius of the circle with the given equation.
-$$x ^ { 2 } + y ^ { 2 } = 9$$
A) Center $( 3,3 ) , r = 3$
B) Center $( 0,0 ) , r = 3$
C) Center $( 3,3 ) , r = 9$
D) Center $( 0,0 ) , r = 9$

Question

Quizplus · Accepted Answer

The given equation is in the standard form $x^2 + y^2 = r^2$, where the center is at the origin $(0,0)$ and the radius $r$ is the square root of 9, which is 3.

Find the Center and Radius of the Circle with the Given