Question 205329
No, your formula is the "point-slope" form of a straight line.
.
The general equation of a circle is:
(x-h)^2 + (y-k)^2 = r^2
where
(h,k) is the center
r is the radius
.
Center at(1,2); radius =1/2
(x-1)^2 + (y-2)^2 = 1/4