Exercises 21.8, page 604

  1. 1. Hyperbola

  2. 3. Ellipse

  3. 5. Hyperbola

  4. 7. Circle

  5. 9. Parabola

  6. 11. Hyperbola

  7. 13. Circle

  8. 15. None (straight line)

  9. 17. Hyperbola

  10. 19. Hyperbola

  11. 21. None (point at origin)

  12. 23. Hyperbola

  13. 25. Parabola: V( − 4 ,  0) :  F( − 4 ,  2)

    An upward opening parabola with a vertex at (negative 4, 0).
  14. 27. Hyperbola: C(1 ,   − 2) ;  V(1 ,   − 2 ± 2)

    A vertical hyperbola centered at (1, negative 2).
  15. 29. Ellipses; C(5 ,  0) ;  V(5 ,   ± 22)

    A vertical ellipse centered at (5, 0).
  16. 31. Ellipse

  17. 33. Parabola

  18. 35. Hyperbola

    Enter both functions (from quadratic formula).

  19. 37.

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