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

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Jan 26, 2016

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This is going to be the graph of a circle with the center at the origin and a radius of 4.

graph{x^2+y^2-16=0 [-11.25, 11.25, -5.625, 5.625]}

#### Explanation:

The formula for a circle is:

The center of this circle will be located at the point (x_c, y_c).

You can expand your equation above to look like this:

From this equation, you know that the center of the circle will be located at

Your radius can be found by using the equation as well. In your equation,

The radius is 4.

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