Question 4528
a) (x^2/9) - (y^2/16) = 1  -> hyperbola
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b) (x^2/81) + (y^2/64) = 1 -> ellipse
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c) x^2 + y^2 = 25 -> circle
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d) y = x^2-2x-8 -> parabola
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e) (y^2/4) - (x^2/9) = 1 ->  hyperbola