The given equation of parabola is $x^2$ = –9y, which is of the form $x^2$ = –4ay. ∴ 4a = 9 ⇒ a = $\frac{9}{4}$ ∴ Coordinates of focus are $\left(0,-\frac{9}{4}\right)$ Axis of parabola is x = 0 Equation of the directrix is y = $\frac{9}{4}$ ⇒ 4y - 9 = 0 Length of latus rectum = 4 × $\frac{9}{4}$ = 9.