Vertex Form
Overview
Goal. Read the vertex, direction, extreme value, and transformations of a parabola directly from vertex form f(x) = a(x − h)² + k.
Vertex form (definition). A quadratic written as f(x) = a(x − h)² + k; its vertex is (h, k).
Lesson Notes
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Lesson Video
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Interactive Activity
Goal. Read the vertex (h, k) directly from f(x) = a(x − h)² + k — including the sign trap in (x + h) — and name the direction, the extreme value, and the transformation.
Vertex form (definition). A quadratic written as f(x) = a(x − h)² + k; its vertex is (h, k).