A series of free, online video lessons with examples and solutions to help Algebra students learn about about parabola conic sections.
Related Pages
Conic Sections: Parabolas
Conic Sections: Circles
Conic Sections: Ellipses
Conic Sections: Hyperbolas
Parabolas of the form y = a(x - h)2 + k
have a vertex at (h, k)
and opens upwards if a > 0
and opens downwards if a < 0
For x2 = 4py, y = -p is the directrix.
For y2 = 4py, x = -p is the directrix.
A quick way to roughly sketch a parabola. Nothing about directrix and focus in this video (see part 2 for that). Find the vertex, x and y intercepts and do a quick graph.
How to go about finding the directrix and the focus for a parabola.
A slightly more involved example of finding the focus and directrix for a parabola..
Find the equation for a parabola given the vertex and given the focus and/or directrix.
Find the equation for a parabola given the vertex and given the focus and/or directrix.
Try out our new and fun Fraction Concoction Game.
Add and subtract fractions to make exciting fraction concoctions following a recipe. There are four levels of difficulty: Easy, medium, hard and insane. Practice the basics of fraction addition and subtraction or challenge yourself with the insane level.
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