Question
In Exercises $55-72$ , find the vertex, focus, and directrix of the parabola and sketch its graph. $$y=-4 x^{2}$$
Step 1
We can rewrite this equation in the standard form of a parabola that opens downwards, $x^{2}=-4py$, by dividing both sides by $-4$ to get $x^{2}=-\frac{1}{4}y$. Show more…
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