engineering mathematics MCQ #592

The directrix of parabola x² = -8y is:

engineering mathematics MCQ #592

  1. Question 1

    Q1. The directrix of parabola x² = -8y is:

    • A) y = 2
    • B) y = -2
    • C) x = 2
    • D) x = -2

    Answer: y = 2

    Explanation: Standard form x² = 4py ⇒ 4p = -8 ⇒ p = -2; directrix is y = -p = 2.