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.
O x2 + (y + 4)2 = 15
1. Use the distance formula to determine the radius:
d = (x2-x;)+ V2 -V,).
O (x – 1)2 + (y + 2)2 = 5
O (x + 4)2 + y2 = 5
2. Substitute the known values into the standard form:
(x – h) + (y – k)? = ?.
O (x + 2)2 + (y – 1)2 = 5
Intro
Done
(x+4)2 + y2 = 5