HP 39gs Quick Start Manual page 54

Table 1- 1 2 Quadratic Explorer Aplet Summary
Summary of Functionality
Press SYMB (or the SYMB menu key) to enter the Symbolic view. In this view, you select a
parameter in a quadratic equation, then change its value to see the resulting effect on the
shape of the graph. The commands are:
Use the left- and right cursor keys to select a parameter
•
• Use the up- and down-cursor keys to increase or decrease the current parameter's value
• Use the (-) key to change the sign of the parameter a
The menu items remain the same as in the Plot view.
Press the TEST menu key to enter the Test view. You can test yourself by supplying the correct
parameters for the graph that is displayed. You can make multiple attempts in each
problem, correcting errors and learning as you go.
48 Getting Started
View Name and Display
Quadratic Explorer Symbolic View
Quadratic Explorer Test View