HP 40gs HP 39gs_40gs_Mastering The Graphing Calculator_English_E_F2224-90010.p - Page 323
Transformations of Graphs, and Trig Explorer and are built into - graphing calculator manual
UPC - 882780045217
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Students should also be encouraged to press the button after finding a solution since a case like this will give 'Extremum' whereas a correct solution will result in either 'Zero' or 'Sign Reversal'. See the manual for more information. Transformations of Graphs This topic can be handled in a number of ways. One of these is to use the Function aplet without enhancement. Enter the basic function into F1(X). For example, you might enter F1(X)=X2. You can then enter transformations into the other functions. Some examples, together with the resulting graphs are shown right. This process will also work with piecewise defined functions which are often the type that are used in examination questions. There are also two aplets which can aid greatly in this process called "Quad Explorer" and "Trig Explorer" and are built into the calculator. Both of these aplets allow the student to explore the effect of changing parameters on the shape of the graph, one using a quadratic and the other with the sine and cosine curves. Students can choose to manipulate the graph and see the effect on the parameters, or to manipulate the parameters and see the effect on the graph. In Quad Explorer there is even a "test yourself" facility provided which will present the student with examples of quadratics for which they must provide an equation, with visual feedback on incorrect guesses. These are highly recommended. See pages 159 & 162. 323