This applet asks students to use sliders to alter the dilation factor, [i]x[/i]-coordinate of the vertex, and [i]y[/i]-coordinate of the vertex and see what happens to the corresponding graph. The text below the graph provides students with some challenges in manipulating the appearance of the graph, and explains why the structure of the equation causes [b]h[/b] and [b]k[/b] to play the roles they do in the vertex form of a quadratic equation.
