گراف های بعضی از معادلات

Point x^2 + y^2 = 0 Circle x^2 + y^2 = r^2 Ellipse x^2 / a^2 + y^2 / b^2 = 1 Ellipse x^2 / b^2 + y^2 / a^2 = 1 Hyperbola x^2 / a^2 - y^2 / b^2 = 1 Parabola 4px = y^2 Parabola 4py = x^2 Hyperbola y^2 / a^2 - x^2 / b^2 = 1