Integrated Publishing
Integrated Publishing: Maximum and Minimum Points
An explanation of how to find maximum (or minimum) point of a quadratic equation, including graphs to enhance understanding. Includes several examples/exercises, with solutions on the page.
Windstream
Ojk's Precalculus Study Page: Quadratic Functions: Graphs
A tutorial devoted to the steps used to graph a quadratic function. Includes tables, graphs, and several sample problems.
University College London
University College London: The Graph of Y = Ax Squared + Bx + C
Provides a walkthrough of graphs of quadratic functions, including what factors "shift" or otherwise affect the parabola.
Lawrence Hall of Science
The Math Page: Topics in Pre Calculus: Basic Graphs
Here is a site that clearly and thoroughly explains the graphs of the major mathematical functions. There are example problems solved, problems for the student to attempt, and answers to the student problems. Point this site out to...
Integrated Publishing
Integrated Publishing: Graphical Interpretation of Roots
This site compares the graphs of three quadratic functions, and explains how certain characteristics of the graph relate to properties of the equations and their solutions. Contains practice problems, including real-world examples.
Integrated Publishing
Integrated Publishing: Graphical Solution
This site explains how graphing can be used to solve (find the roots of) a quadratic equation. Practice problems are included.