Answer
The $y$-coordinate of the vertex
Work Step by Step
For a quadratic function $f$, the expression $f\left( -\frac{b}{2a} \right)$ represents the $y$-coordinate of the vertex since $-\frac{b}{2a}$ is $x$-coordinate of the vertex.
Big Ideas Math - Algebra 1, A Common Core Curriculum
by Larson, Ron; Boswell, Laurie
Published by
Big Ideas Learning LLC
ISBN 10:
978-1-60840-838-2
ISBN 13:
978-1-60840-838-2
Chapter 8 - Graphing Quadratic Functions - 8.3 - Graphing f(x) = ax^2 + bx + c - Exercises - Page 438: 44
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