Question

which of the following circles have their centers in the second quadrant ?

A. (x+2)2+(y-5)2=9
B.(x-4)2+(y+3)2=32
c.(x+1)2+(y-7)2=16
D.(x-5)2+(y-6)2=25

Answer 1

well the standard form is

\[(x - h)^2 + (y - k)^2= r^2 \]

(h k) is the centre and r is the radius

2nd quadrant, x is negative and y is positive