To get students into the swing of comparing 2-4 quadratic functions I had them pick up an equation and graph on their way in today. The equations were of the form y = ax² + c, and either had different a values or c.

They put ’em up by colors and had a quick galley walk, discussing the similarities and differences.

Desmos and the ability to add sliders, made everyone’s lives a whole lot easier when it came down to comparing functions like:

f(x) = x²

to

g(x) = -¾x² – 12.

Students seemed to pick up on transformations pretty quick and did well in describing the differences between functions.

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Thom H GibsonLove the gallery walk idea. Did something similar during a lesson: http://wp.me/p3LdGY-8S

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