
Quadratic Explorer app
The Quadratic Explorer app can be used to investigate the behavior of y = a(x+h)
2
+ v as the values of a, h and
v change.
Open the app
Press and select Quadratic Explorer.
The left half of the display shows the graph of a quadratic function. The right half shows the general form of
the equation being explored at the top and, below it, the current equation of that form. The keys you can use
to manipulate the graph or equation appear below the equation. (These will change depending on the level of
equation you choose.) Displayed beneath they keys is the equation, the discriminant (that is, b
2
–4ac), and the
roots of the quadratic.
Graph mode
The app opens in graph mode. In graph mode, you manipulate a copy of the graph using whatever keys are
available. The original graph—converted to dotted lines—remains in place for you to easily see the result of
your manipulations.
Four general forms of quadratic equations are available for you to explore:
340 Chapter 21 The Explorer apps
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