Use the Discriminant to Classify the Graph $x ^ { 2 } - 10 x y - 8 y ^ { 2 } - 18 = 0$

Multiple Choice

Use the discriminant to classify the graph. $x ^ { 2 } - 10 x y - 8 y ^ { 2 } - 18 = 0$

A) The graph is a parabola.
B) The graph is a hyperbola.
C) The graph is a ellipse.
D) The graph is a cone.
E) The graph is a circle.