Exploring Quadratic Functions

Please manipulate k, h and a ( in that order). By changing these values, the graph of the quadratic function will change. Make note of these changes.

1. What effect does changing "k" have on the graph? 2. What effect does changing "h" have on the graph? 3. What effect does changing "a" have on the graph? 4. What does the "axis of symmetry" represent?