TI-83 Plus Function Graphing 141
4. Press Í. The TI-83 Plus adjusts the viewing window by XFact and
YFact; updates the window variables; and replots the selected
functions, centered on the cursor location.
5. Zoom in on the graph again in either of two ways.
• To zoom in at the same point, press Í.
• To zoom in at a new point, move the cursor to the point that you
want as the center of the new viewing window, and then press
Í.
To zoom out on a graph, select 3:Zoom Out and repeat steps 3 through 5.
To cancel Zoom In or Zoom Out, press ‘.
ZDecimal
ZDecimal replots the functions immediately. It updates the window
variables to preset values, as shown below. These values set @X and @Y
equal to 0.1 and set the X and Y value of each pixel to one decimal place.
Xmin=L4.7 Ymin=L3.1
Xmax=4.7 Ymax=3.1
Xscl=1 Yscl=1