The given equation of parabola is $x^2$ = –16y, which is of the form $x^24 = –4ay. ∴ 4a = 16 ⇒ a = 4 ∴ Coordinates of focus are (0, –4) Axis of parabola is x = 0 Equation of the directrix is y = 4 ⇒ y – 4 = 0 Length of latus rectum = 4 × 4 = 16.