Question 417507
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Hi
Standard Form of an Equation of a Circle is {{{(x-h)^2 + (y-k)^2 = r^2}}}
where Pt(h,k) is the center and r is the radius
5. (0,0), radius 3    x^2 + y^2 = 9
6. (0,2), radius 8    x^2 + (y-2)^2 = 64
7. (5, –1), radius 6  (x-5)^2 + (y+1)^2 = 36
{{{drawing(300,300, -10, 10, -10, 10,  grid(1),
circle(0, 0,3),
circle(0, -2,8),
circle(0, -2,.3),
circle(-5,-1,6),
circle(-5,-1,.3),
graph( 300, 300,  -10, 10, -10, 10))}}}