I need help identifying the graphs of the following equations and their angles of rotation. I know I should be comparing these equations against the general equations and looking at the differences between the variables to determine the type of equation, and that I should be using the discriminant to determine the angles of rotation. However, I have never seen this done with equations with so few variables. I would really appreciate not just the answers, but explanations! Thanks. 1. y^2 + 8x = 0 I'm pretty sure this is a parabola, but I have no idea about the angle of rotation 2. 3xy - 4 = 0 hyperbola? 3. 9x^2 - 4(sqrt3)xy + 5y^2 = 15 ellipse?