|Tool: Quadratic grapher - vertex form - Math Open Reference||
|Go to:||http://www.mathopenref.com/quadvertexexplorer.html
(opens a new window)| An interactive applet that allows the user
to graphically explore the properties of a quadratic equation
when expressed in vertex form. Specifically, it is designed to
foster an intuitive understanding of the effects of changing the
coefficients in the function. The applet shows a large graph of
a quadratic in vertex form (a+h)^2+k and has three slider
controls, one each for the coefficients a,h and k. As the
sliders are moved, the graph is redrawn in real time
illustrating the effects of these variations. It shows for
example that h and k determine the location of the curve but do
not affect its shape. The roots of the equation are shown. The
text part of the page gives some example activities to try.
Results can be turned off to allow classroom discussions. Applet
can be enlarged to full screen size for use with a classroom
projector. After use in the classroom, st