|
Question 546682: Given the vertex of a parabola (-4,5) and the focus (-6,5), find the equation of the directrix.
Answer by lwsshak3(11628)   (Show Source):
You can put this solution on YOUR website! Given the vertex of a parabola (-4,5) and the focus (-6,5), find the equation of the directrix.
**
Since the x-coordinates of vertex and focus differ and their y-coordinates do not, this is a parabola which opens sideways to the left since focus is to the left of the vertex on the axis of symmetry, (y=5) Standard form of equation for given parabola: y^2=-4px
p=distance from vertex to focus and to directrix on the axis of symmetry=2
Equation of directrix: x=-2
|
|
|
| |
