Casio CFX9850GBPLUS User Manual page 195

• If you do not specify a variable name (variable A in the above key operation), the calculator
automatically uses one of the default variables listed below. Note that the default variable
used depends on the memory area type where you are storing the graph function.
Memory Area Type
Example Y1 (3) and Y1 (X = 3) are identical values.
• You can also use Dynamic Graph for a look at how changes in coeffi cients alter the
appearance of a graph. See "5-8 Dynamic Graphing" for more information.
5-3-5
Drawing a Graph
Y n
r n
X tn
Y tn
fn
20070201
Default Variable
X
T
T
X