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Inside Collection: Advanced Algebra II: Teacher's Guide
OK, we’re done solving quadratic equations—we already have three techniques and that’s enough. But—one thing I say a million times throughout my class—you never really understand a function until you graph it.
So, they can do the exercise “Graphing Quadratic Functions.” It doesn’t require any buildup, they can do it right now. Note that we are not introducing any of the formal machinery of parabolas (focus, directrix, etc.)—all that will come much later, in the unit on conics. We are graphing both horizontal and vertical parabolas the way we did in the very first unit on functions—by taking an initial starting point (
It might be worth mentioning that a horizontal parabola is not a function. But we can still talk about it and graph it.
Finish the in-class assignment. That was a long one, wasn’t it?
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This work is licensed by Kenny M. Felder under a Creative Commons Attribution License (CC-BY 2.0), and is an Open Educational Resource.
Last edited by Kenny M. Felder on Apr 15, 2009 3:44 pm -0500.
"This is the "teacher's guide" book in Kenny Felder's "Advanced Algebra II" series. This text was created with a focus on 'doing' and 'understanding' algebra concepts rather than simply hearing […]"