College Algebra / Unit 6 Alg 322 short lesson, about 20 seconds
The Vertex and Axis of Symmetry
Captions available
The idea
The vertex is the parabola's extreme point — lowest opening up, highest opening down — and the axis of symmetry is the vertical line through it.
In practice
For f(x) = x² − 4x + 3, the vertex is (2, −1) and the axis is x = 2; the halves mirror across it.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
- Nothing. This is a starting point.
Unlocks
- Nothing yet depends on this.
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