Working With Functions; Using The Entry Line - Texas Instruments TI-NSPIRE Software Manual

Working with functions

The entry line under the work area lets you specify functions in the
format supported for each graph type in Graphs & Geometry.

Using the entry line

The entry line displays at the bottom of the page. The entry line displays
the form to use to type the function that corresponds to the selected
graph type. To type details for a function on the entry line:
1. Select the graph type to set the graphing mode. You can specify
multiple functions for each graph type. The default graph type is
Function, so the form f1(x)= displays.
2. Type the data for the type of function you want to graph using the
function formatting that displays on the entry line:
– To graph a function, select Function on the Graph Type menu.
The work area and entry line change to function mode. Enter an
expression for the function after the equal sign.
– To graph a parametric equation, select Parametric. The work
area and entry line change to parametric mode. Type
expressions for xn(t) and yn(t). Specifying alternate values for
the default t-min, t-max, and t-step displayed is optional.
– To graph a polar equation, select Polar. The work area and entry
line change to polar mode. Type an expression for rn(q).
Specifying alternate values for the default q-minimum and q-
maximum, and q-step displayed is optional.
– To graph a scatter plot, select Scatter Plot. The work area and
entry line change to scatter plot mode. Click the arrows that
display to choose x and y for sn.
3. Press
Enter
After your selection is graphed, the entry line changes to enable you to
specify another graph of the same type. For example, after you graph
f1(x), the entry line changes to f2(x)= to enable you to enter another
function.
As you graph multiple functions on one set of axes, Graphs & Geometry
labels each with its function. You can define and graph a maximum of 99
functions of each type. For example, you use function mode to specify
functions (f1(x) - f99(x) ). You can also rename multiple functions that use
custom names, for example, g1(x).
Note: If you draw a geometric figure, the entry line may disappear from
the page. Press
Using Graphs & Geometry
or .
Tab
to select the Show Entry Line tool (
Ctrl G
).
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