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The grid lines in the graph below are one unit apart. What is the equation of the circle plotted in the graph in standard form?

Guest Feb 23, 2021

CubeyThePenguin · Answer 1 · 2021-02-23T01:05:52

The center of the circle is at (2, -4) and the radius of the circle is 4. We can write the equation like this and simplify.

$(x-2)^2 + (y+4)^2 = 16$

$(x^2 - 4x + 4) + (y^2 + 8y + 16) = 16$

$x^2 - 4x + y^2 + 8y + 4 = 0$

Guest · Answer 2 · 2021-02-23T01:07:34

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Thank you so much!

Guest Feb 23, 2021

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its actually (x-2)^2+(y+3)^2=16 ... the center of the circle is at (2,-3)

Guest Mar 3, 2021

+21

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thx for letting me cheat on my aops test whoever posted these- xD