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WU Number 6, Problem 9

A parabola is the set of points equidistant from a line, called the directrix, and a fixed point, called the focus. Assume the focus is not on
the line. Construct a parabola given a fixed point for the focus and a line (segment) for the directrix.

• Use an Action Button to generate the parabola from an animation and trace of a constructed point, for action click here.
• Repeat 9a with a trace of the tangent line at the constructed point, for action click here.
• Use the locus command to generated the parabola from a constructed point or the tangent line at that point, for action click here.