
Function variables
The result of each numerical analysis in the Function app is assigned to a variable. These variables are named
as follows:
●
Root
●
Isect (for Intersection)
●
Slope
●
SignedArea
●
Extremum
The result of each new analysis overwrites the previous result. For example, if you nd the second root of a
quadratic equation after nding the rst, the value of Root changes from the rst to the second root.
Accessing function variables
The Function variables are available in Home view and in the CAS, where they can be included as arguments in
calculations. They are also available in Symbolic view.
1.
To access the variables, press , tap , and then select Function.
2. Select Results and then the variable of interest.
The variable’s name is copied to the insertion point and its value is used in evaluating the expression that
contains it. You can also enter the value of the variable instead of its name by tapping .
For example, in Home view or the CAS you could select SignedArea from the Vars menus, press 3
and get the current value of SignedArea multiplied by three.
Function variables 127
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