Question

Given the equation of a circle: (x + 2)^2 + (y - 7)^2 = 49 , give the center and the radius.
a.Center (2, -7); radius = 7
b.Center (-2, 7); radius = 7
c.Center (2, -7); radius = 49
d.Center (-2, 7); radius = 49

Answer 1

The general equation of a circle is
(x - h)^2 + (y - k)^2 = r^2, where (h,k) is the center and r is the radius
In this particular case, it seems
h = - 2
k = 7
r = 7,
so I'd go for
B