Question

What is the equation of this circle?

x2 + (y + 1)2 = 4

x2 + (y – 1)2 = 2

x2 + (y + 1)2 = 2

x2 + (y – 1)2 = 4

Answer 1

the one with centre \((0,1)\) and radius 2

Answer 2

center is (0, 1) , radius = 2

plug it into (x-h)^2 + (y-k)^2 = r^2

Answer 3

idk howwhat means what can you explain it tpo me plz

Answer 4

is it the last one?