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.
f(x) = x²
g(x) = -¾x² – 12.
Students seemed to pick up on transformations pretty quick and did well in describing the differences between functions.