The equation of the circle whose center is at (2, 1) and radius is 3 is
a. (x + 2)² + (y + 1)² = 9
b.(x - 2)² + (y - 1)² = 9
c.(x - 2)² + (y - 1)² = 3

B.  (x - 2)^2 + (y - 1)^2 = 9.

Step-by-step explanation:

The general equation for a circle can be written as:

(x - a)^2 + (y - b)^2 = r^2    where the centre is at (a, b) and the radius= r.

Here a = 2, b = 1 and r = 3 so the answer is:

(x - 2)^2 + (y - 1)^2 = 3^2

= (x - 2)^2 + (y - 1)^2 = 9.

the image of (6, 9) under a dilation is (4, 6). the scale factor is

europa2433

europa2433

step-by-step explanation: