Conic Sections: Parabolas, Part 1. In this video, I discuss a quick way to roughly sketch a parabola. Nothing about directrix and focus in this video (look in part 2!). I simply find the vertex, x and y intercepts and do a quick graph.
This series of 39 short video lessons on Conic Sections covers topics such as: Parabolas, hyperbolas, ellipses and circles, plus how to identify a conic by completing the square.