Apple Newton Works Graphing Calculator - Manual (Page 23)

2 Tap Tools, then tap Evaluate (or press Enter).
Your variable is added to the User Variables list.
Displaying the value of a variable
To display the value of a variable, follow these steps:
1 Enter the variable name.
2 Tap Tools, then tap Evaluate (or press Enter).
Changing the value of a variable
To change the value of a variable, follow these steps:
1 Enter the variable name and its new value.
2 Tap Tools, then tap Evaluate (or press Enter or Return).
Graph and table variables
The graphing calculator has some predefined system variables that define the graph
and table views.
Using Functions and Variables 23