Question 1040449
<a href="https://www.youtube.com/watch?v=Wworlx39KfQ">Video - Find equation of parabola if directrix and focus are given</a>


Review the definition of a parabola.  You can find the direrctrix using the given vertex and focus.  Your parabola is concave downward, and has vertex as a maximum.  Study the helpful video referenced above.