# How do you graph x^2+y^2=16?

Jan 30, 2016

This is simply a circle of radius $4$, centered at the origin $\left(0 , 0\right)$.

#### Explanation:

The standard form for the equation of a circle is:

${\left(x - a\right)}^{2} + {\left(y - b\right)}^{2} = {c}^{2}$

where the center of the circle is the point $\left(a , b\right)$ and its radius is $c$ units.

In this case $a$ and $b$ are both $0$, and ${4}^{2} = 16$.