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This video explains the basic concepts of a parabola. The focus and directrix are equidistant from the vertex, which is the lowest point of the parabola. The distance "p" between the vertex and the focus/directrix determines the size of the parabola. The instructor demonstrates how to graph a parabola by determining whether it opens up or down, locating the vertex, and finding the value of "p". They also explain how to draw the axis of symmetry, focus, and directrix. The video then explains how to graph a parabola that opens to the left, with the vertex to the right of the focus and directrix. The viewer is encouraged to practice by solving two provided exercises.
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