The equation of a circle is (x+6)2+(y+8)2=1. What are the center and radius of the circle?Choose 1 answer:(A) The center is (6,−8) and the radius is 1 .(B) The center is (−6,8) and the radius is 1 .(C) The center is (−6,−8) and the radius is 1 .D The center is (6,8) and the radius is 1 .
Q. The equation of a circle is (x+6)2+(y+8)2=1. What are the center and radius of the circle?Choose 1 answer:(A) The center is (6,−8) and the radius is 1 .(B) The center is (−6,8) and the radius is 1 .(C) The center is (−6,−8) and the radius is 1 .D The center is (6,8) and the radius is 1 .
Equation of a Circle: The equation of a circle in the standard form is (x−h)2+(y−k)2=r2, where (h,k) is the center of the circle and r is the radius.
Matching the Standard Form: The given equation is (x+6)2+(y+8)2=1. To match the standard form, we can see that h=−6 and k=−8, since the standard form has (x−h) and (y−k).
Finding the Radius: The radius r is the square root of the right side of the equation. Since the right side of the equation is 1, the radius r is 1, which is 1.
Center and Radius: Therefore, the center of the circle is (−6,−8) and the radius is 1. This corresponds to choice (C).
More problems from Compare linear and exponential growth