16. Parametric Equations & Polar Coordinates

How can you slice a vertically oriented 3D cone to get a 2D parabola?

How can you slice a vertically oriented 3D cone with a 2D plane to get a circle?

A vertically oriented 3D cone is sliced with a vertical 2D plane. What is the conic section that will form?

Sketch a graph of the circle based on the following equation: $x^2+\left(y-1\right)^2=9$