Texas Instruments TI-83 PLUS - Manual (Page 133)

TI-83 Plus Function Graphing 130
If you performed any of these actions since the graph was last displayed,
the
TI-83 Plus will replot the graph based on new values when you press
s .
•
Changed a mode setting that affects graphs
•
Changed a function in the current picture
•
Selected or deselected a function or stat plot
•
Changed the value of a variable in a selected function
•
Changed a window variable or graph format setting
•
Cleared drawings by selecting ClrDraw
•
Changed a stat plot definition
Overlaying Functions on a Graph
On the TI-83 Plus , you can graph one or more new functions without
replotting existing functions. For example, store sin(X) to Y 1
in the
Y= editor and press s . Then store cos(X) to Y 2
and press s
again. The function Y 2
is graphed on top of Y 1
, the original function.