Question

What is the general form of the equation of a circle with a center at the (4, 2) and a radius of 9?

(x – 4)2 + (y – 2)2 = 81

(x – 4)2 + (y + 2)2 = 81

(x + 4)2 + (y – 2)2 = 81

(x + 4)2 + (y + 2)2 = 81

Answer 1

\[(x-h)^2+(y-k)^2=r^2\]

Answer 2

I'm guessing its the first one?

Answer 3

No! Actually the last :) since 4 and 2 are positives

Answer 4

x=4

x-4=0