I don’t know got to get the equation please help
asked Dec 6, 2017 in Algebra 2 Answers by Trying to graduate

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The equation of a parabola can be written y=a(x-h)²+k where (h,k) is the vertex. The focus is at (h,k+p) and the directrix line is y=k-p where ap=1/4.

So (0,-5)=(h,k+p) making h=0, -5=k+p and 5=k-p.

From this we get k=0 and p=-5, making a=-1/20.

The equation is y=-x²/20.

answered Dec 9, 2017 by Rod Top Rated User (550,780 points)

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