This is a 3 chapter GeoBook to illustrate the effect of modifying the value of the coefficients of a quadratic function on its graph.
First the correspondence between how "wide" or "narrow" the graph becomes, as the leading coefficient is "close" to zero.
Later what is the correspondence between the graph and the value of the constan parameter, when the vertex belongs to the "y" axis.
Finally, how modifying parameters a, h, and k modify the position and the shape of the parabola.
