Completion requirements
Parabolas can be constructed when a plane cuts through a right circular cone. If the plane is parallel to the edge of the cone, a parabola is formed. In this section, you will explore the characteristics of parabolas and use them to construct equations of parabolas. Note that these are not the parabolas we studied before because they are not functions.
Ex 2: Conic Section: Parabola with Vertical Axis and Vertex at the Origin (Down)
Source: Mathispower4u, https://www.youtube.com/watch?v=dj0gCTc5Bug
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