Find the equation of a circle satisfying the given conditions.
-Center: $(0,-7)$; radius: $\sqrt{7}$
A) $x^{2}+(y-7)^{2}=7$
B) $(x+7)^{2}+y^{2}=49$
C) $x^{2}+(y+7)^{2}=7$
D) $(x-7)^{2}+y^{2}=49$

Question

Quizplus · Accepted Answer

The equation of a circle with center $(h, k)$ and radius $r$ is $(x-h)^{2}+(y-k)^{2}=r^{2}$. Substituting $h=0$, $k=-7$, and $r=\sqrt{7}$ gives $x^{2}+(y+7)^{2}=7$.

Find the Equation of a Circle Satisfying the Given Conditions (0,−7)(0,-7)(0,−7)

Find the Equation of a Circle Satisfying the Given Conditions $(0,-7)$