The circle
determine the equation of a circle with a center at (4,0) what is the equation of a circle with a center at (4,0)
that passes through the point (-2, 1) by following the that passes through the point (-2, 1)?
steps below
x2 + (y + 4) = 5
1. use the distance formula to determine the radius:
o = (x2-x1)? +(
c (x - 1)2 + (y + 2)2 = 5
c (x + 4)2 + y2=5
2. substitute the known values into the standard form:
(x-h)2 + (y - k) = r2
c (x + 2)2 + (y - 12 = 15