Question 1048805
The directrix is on the other side of the vertex than the focus.


Review these to learn a better understanding.


<a href="https://www.youtube.com/watch?v=M8LGsQMwwj4">Derive equation for parabola if given focus and directrix</a>
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<a href="https://www.youtube.com/watch?v=Wworlx39KfQ">Same but different orientation and vertex not at origin</a>