Axis of symmetry and vertex algebraically

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SWBAT determine the axis of symmetry and vertex of a quadratic function.

Big Idea

Don't be so negative, b! Get over 2a. Show students a funny and memorable way to remember the formula for the axis of symmetry.


10 minutes

Each day, students complete a Warmup that usually consists of spiraling the previous day's material, in addition to older material.  Warm-up problems also sometimes extend lessons that students have encountered before to more unfamiliar contexts.

I often use a "mixtape" approach that pushes the kids to see/review multiple types of problems - the cumulative effect of which can be really powerful. Today's warm-up both reviews the previous day and then reaches back to linear functions and bivariate data for an additional review.

Play of the Day

40 minutes


10 minutes


15 minutes

Tonight's homework challenges students with a number of different applications but a primary emphasis on the Axis of symmetry and the vertex of a parabola.