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MathGrade 9-11

Quadratic Functions Answer Key

Graph parabolas and find key features like vertex, axis of symmetry, and roots of quadratic functions.

Looking for Quadratic Functions answers? This complete answer key provides verified solutions for all student exploration activities and assessment questions in the ExploreLearning Quadratic Functions Gizmo.

100% Free • Step-by-step explanations • Perfect for homework help • Covers all activities • Updated for 2026

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Understanding Parabolas

Q1.What does a quadratic function look like?

Answer

It's written as y = ax² + bx + c and its graph is a U-shaped curve called a parabola.

Q2.How do you know if a parabola opens up or down?

Answer

If a is positive, it opens up. If a is negative, it opens down.

Q3.What's the vertex of a parabola?

Answer

The highest or lowest point on the parabola - the turning point.

Finding Key Features

Q4.What's the axis of symmetry?

Q5.What are the roots or zeros of a quadratic?

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