Quad Explorer aplet
charge and transferred to the HP 39gs using the provided Connectivity Kit.
The Quad Explorer aplet is used to investigate the behaviour of y = a(x + h)2 + v as the values of a, h and v change, both by manipulating the equation and seeing the change in the graph, and by manipulating the graph and seeing the change in the equation.
H I N T More detailed documentation, and an accompanying student work sheet can be found at HP’s web site.
Press | , select Quad |
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Explorer, and then press |
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. The Quad Explorer |
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aplet opens in |
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mode, in which the arrow |
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keys, the | and | keys, |
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and the |
| key are used to change the shape of the | ||
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graph. This changing shape is reflected in the equation displayed at the top right corner of the screen, while the original graph is retained for comparison. In this mode the graph controls the equation.
It is also possible to have the equation control the graph.
Pressing 
displays a
Pressing the 
and 
key moves between sub- expressions, while pressing the 
and 
key changes their values.
Pressing 
allows the user to select whether all three
A
button is provided to evaluate the student’s
knowledge. Pressing 
displays a target quadratic graph. The student must
manipulate the equation’s parameters to make the equation match the target graph. When a student feels
that they have correctly chosen the parameters a 
button evaluates the answer and provide feedback. An 
button is provided for those who give up!
Getting started |