Education Technology

Algebra 1: Using Symmetry to Find the Vertex of a Parabola

by Texas Instruments - Bell Ringer Lesson


Students graph a quadratic function and investigate its symmetry by choosing pairs of points with the same y-value.

Key Steps

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    This activity enables students to investigate the axis of symmetry of a quadratic.

    Students graph a quadratic equation and examine it.

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    Students use the table of values to study the quadratic equation further.

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    Students then adjust the table set up to choose a pair of x-values that have the same y-value.  On the Home screen, they find the average of the values. This is done for several pairs of values.