Question 150361
16x^2=y.
There are 4 choices for an answer:
1. Focus (0,4), directrix y=-4
2. Focus (0,1/4), directrix y=-1/4
3. Focus (0,1/16), directrix y=-1/16
4. Focus (0,1/64), directrix y=-1/64
Thank you for your time and help, Natalie!
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The standard from for parabolas is x^2=4py
So y = x^2/4p = 16x^2
x^2/4p = 16x^2
4p = x^2/16x^2 = 1/16
p = 1/64
P is the distance from the Origin to the directrix, and (0,p) is the focus.
That's answer #4.
*[invoke solve_quadratic_equation 16,0,0]