Find the center and radius of the circle.
-$$x ^ { 2 } + y ^ { 2 } = 7$$
A) $( 0,0 ) , r = 7$
B) $( 1,1 ) , r = \sqrt { 7 }$
C) $( 1,1 ) , r = 7$
D) $( 0,0 ) , r = \sqrt { 7 }$

Question

Quizplus · Accepted Answer

The equation of a circle in the standard form is $(x - h)^2 + (y - k)^2 = r^2$, where $(h, k)$ is the center and $r$ is the radius. The given equation $x^2 + y^2 = 7$ matches this form with $h = 0$, $k = 0$, and $r^2 = 7$, so the center is $(0,0)$ and the radius is $\sqrt{7}$.

Find the Center and Radius of the Circle x2+y2=7x ^ { 2 } + y ^ { 2 } = 7x2+y2=7

Find the Center and Radius of the Circle $x ^ { 2 } + y ^ { 2 } = 7$