Graphing Inequalities; Renaming F(X) - Texas Instruments TI-NSPIRE Software Manual

Regardless of how you enter functions, each function is labeled on
the graph for identification.

Graphing inequalities

Function mode enables you to define a function that uses a symbol other
than the equal sign. To change = to a different sign and graph the
inequality:
1. Position the cursor to the right of the equal sign.
Press
Backspace
2. Type the desired sign or use the Symbol Palette to enter the
appropriate inequality. The possible inequalities are: >, +, {, and |.
3. Type the rest of the inequality expression.
Press
Enter
The expression, as typed, displays next to the graph. Shading is
always present on the graphs of inequalities to show the values that
satisfy the inequality. If you graph two inequalities that overlap, the
area of overlap is shaded darker than either of the individual
inequality graphs.

Renaming f(x)

fn(x) is the default naming convention for functions and inequalities
entered into Graphs & Geometry. The number, represented by n,
increases as you enter more functions.
To change fn(x) on the entry line:
1. Place your cursor to the right of the = sign in the entry line.
104
to delete the equal sign.
to graph it.
Using Graphs & Geometry