Question

Determine the equation of the circle graphed below. Circle Standard Form: Center: (h, k). Radius: r. (x-h) ^2+(y-k) ^2=r^2. Center: (4, -2). Radius: 4.

Answer 1

Using center (4, −2) and radius 4:

(x − 4)^2 + (y + 2)^2 = 16

Expanded: x^2 + y^2 − 8x + 4y + 4 = 0