Axis of Symmetry: A vertical line that divides the parabolic graph of a quadratic function into two symmetric halves.
Vertex: The point on the graph where the parabola reaches its maximum or minimum value. It represents either the highest or lowest point on the curve.
Maximum/Minimum Value: The highest or lowest point on the graph of a quadratic function, respectively. It corresponds to either the vertex's y-coordinate or an extreme value in real-life applications.