Question 50680
a) Only one variable is squared, so it is a parabola.
b) Difference (subtraction!) of the squares, so it is a hyperbola.
c) Sum of the squares with same coefficients of x^2 and y^2, so it is a circle.
d) Sum of the squares with unlike coefficients of x^2 and y^2, so it is an ellipse.


R^2 at SCC