The focus of a parabola is (0,−2) . The directrix of the parabola is y=-1 .

jjennylove Mar 15, 2019

#1**0 **

I assume you need the equation for the parabola

The vertex lies at (0, - 1.5)

Since the directrix is above the focus....the parabola turns downward

p = l -1 - - 1.5 l = l .5 l = = .5

So...we have this form

4p ( y + 1.5) = - ( x - 0)^2

4(.5)(y + 1.5) = - x^2

2 ( y + 1.5) = -x^2

y + 1.5 = -(1/2)x^2

y = -(1/2) x^2 - 1.5

Here's the graph : https://www.desmos.com/calculator/kqbcr8utzm

CPhill Mar 15, 2019