Question 1010247
These will help you; you will also first need to identify the focus point.  Once having it, use the formula or derive it from known focus, directrix and distance formula.


<a href="https://www.youtube.com/watch?v=M8LGsQMwwj4">Derive parabola equation, given focus and directrix</a>


<a href="https://www.youtube.com/watch?v=Wworlx39KfQ">same thing if vertex not at the origin</a>