How do you graph $x^2 + y^2 = 1$ ?

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Answer 1 · 2016-01-25T19:52:57

It is the equation of a circle:

Probably you can recognize it as the equation of a circle with radius $r=1$ and center at the origin, $(0,0)$ :
enter image source here

The general equation of the circle of radius $r$ and center at $(h,k)$ is:
$(x-h)^2+(y-k)^2=r^2$

How do you graph x^2 + y^2 = 1 x^2 + y^2 = 1 ?