Quadratic Functions and Parabolas
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State
A quadratic function is a polynomial function of degree two; its graph is a parabola, opening upward when a is positive and downward when a is negative.
Show
f(x) = x² − 4x + 3 has a = 1, so its parabola opens upward — a cup, not a dome.
Builds on
- Nothing — this is a starting point.
Unlocks
- Nothing yet depends on this.