Question #7c401
1 Answer
Aug 3, 2016
The vertex is at
Explanation:
The vertex of a parabola is the midpoint between the focus and the point where the axis (the axis = the line perpendicular to the directrix, and pasding through the focus), intersects the directrix.
1) Focus =
2) Axis = perpendicular to the directrix through the focus: the directrix has slope
3) Intersection of the axis with the dierctrix:
Thus the intersection is at
4) Midpoint between the focus