Question

Which equation represents a circle?
x2 – 2x – 24 = 0
x2 – 2x – y – 23 = 0
y2 – 2x – 2y – 78 = 0
x2 + y2 – 2x – 2y – 34 = 0
y2 – 2y – 23 = 0

Answer 1

Have you tried graphing any of these yet?

Answer 2

any ideas?

Answer 3

I feel like its the 4th one but I aint positive. Is this Algebra II?

Answer 4

I think it is the fourth one also, because it's the only one that has x^2 and y^2 in it

Answer 5

With more certainty.

Answer 6

Thank you guys <3 im going with the 4th one