The vertex of the parabola is at (5,3) and its focal length is
8/4 = 2.
Since it opens to the right, the directrix will be a vertical line 2 units to the left of the vertex,
so its equation will be x=(5-2),
or x=3
Find the directrix and an equation for this parabola?
distance by the vertex for the focus is 2 = d, the focal distance. so the directrix has located 2 units from the opposite direction to the vertex at y = -1. Vertex to of the equation to a parabola is given by where (h, k) are the coordinates to the vertex.
How to write an equation for a parabola?
Writing the Equation to Parabolas
- Determine which pattern of use (based on whether this is horizontal and vertical)
- Substitute to h or k
- Choose the coordinate to substitute in and solve for a.
- Write your final equation with a, h, or k.
Learn more about equation of the directrix here https://brainly.com/question/17376399
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