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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?

 

 
 Feb 23, 2021
 #1
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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.

 

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

 

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

 

\(x^2 - 4x + y^2 + 8y + 4 = 0\)

 
 Feb 23, 2021
 #2
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Thank you so much! smiley

 
 Feb 23, 2021

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