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

Name: Find the center and radius of the circle. -$x ^ { 2 } + y ^ { 2 } = 9$ A) $( 0,3 ) , r = 9$ B) $( 0,0 ) , \mathrm { r } = 9$ C) $( 3,3 ) , r = 9$ D) $( 0,0 ) , r = 3$
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The equation $x^2 + y^2 = 9$ is in the standard form for a circle centered at the origin $(0,0)$ with radius $\sqrt{9} = 3$.

Find the Center and Radius of the Circle x2+y2=9x ^ { 2 } + y ^ { 2 } = 9x2+y2=9

Find the Center and Radius of the Circle $x ^ { 2 } + y ^ { 2 } = 9$