HP 40gs hp 40gs_user's guide_English_E_HDPMSG40E07A.pdf - Page 26

hp40g+.book Page 14 Friday, December 9, 2005 1:03 AM charge and transferred to the HP 40gs using the provided Connectivity Kit. Quad Explorer aplet HINT 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. More detailed documentation, and an accompanying student work sheet can be found at HP's web site. Press , select Quad Explorer, and then press . The Quad Explorer aplet opens in mode, in which the arrow keys, the and keys, and the key are used to change the shape of the 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 sub-expression of your equation. Pressing the and key moves between subexpressions, while pressing the and key changes their values. Pressing allows the user to select whether all three sub-expressions will be explored at once or only one at a time. 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! 1-14 Getting started