Rotate the coordinate axes to change the given equation into an equation which has no cross product (xy) term. Identify the graph of the equation as a hyperbola, ellipse, parabola, a straight line, or parallel lines.3xy = 9

A. u2 + v2 - 9 = 0; Ellipse
B. u2 - v - 9 = 0; Parabola
C. u2 + v2 + u - v - 9 = 0; Ellipse
D. u2 - v2 - 9 = 0; Hyperbola

Answer: D

Mathematics

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