Question 527273
For the parabola, y=1/20x^(2), what is the equation of the directrix.
**
Standard form of equation for given parabola: x^2=4py.
y=1/20x^(2)
x^2=20y
4p=20
p=5
vertex:(0,0)
parabola opens upwards
Equation of directrix:
y=-5