Write the standard form of the equation and the general form of the equation of the circle of radius r equals 9

r=9 and center left parenthesis h comma k right parenthesis equals left parenthesis 0 comma 0 right parenthesis .

(h,k)=(0,0). Graph the circle.

The standard form of the equation of this circle is

left parenthesis x right parenthesis squared plus left parenthesis y right parenthesis squared equals left parenthesis 0 comma 0 right parenthesis Superscript nothing

(x)2+(y)2=(0,0).