Find the focus, directrix, and focal diameter of the parabola. x2 = 9y

focal-diameter
x2-9y

#1

Find the focus, directrix, and focal diameter of the parabola. x2 = 9y

Answer:

focus:(0,9/4)
Directrix = -9/4
Focal diameter: (18/4,9/4),(-18/4,9/4)