Expron, Exproff - Texas Instruments TI-83 Manual Book

ExprOn, ExprOff

and
ExprOn ExprOff
when the trace cursor is active. This format setting also applies to stat
plots.
When is selected, the expression is displayed in the top-left
ExprOn
corner of the graph screen.
When
ExprOff
corner specifies which function is being traced.
TI-83 Plus Function Graphing
determine whether to display the
and both are selected, the number in the top-right
CoordOn
expression
Y=
128