Algebra 1 · Quadratic Functions
Vertex
Algebra 1 · Quadratic Functions
Definition
The vertex is the highest or lowest point of a parabola, where it changes direction.
Examples
- y = x^2 has vertex (0, 0).
- y = (x - 2)^2 + 1 has vertex (2, 1).
Key rule
The vertex is the maximum or minimum point of the parabola.
Memory hook
Vertex = the turning point, top or bottom.