to see the window used to
graph a function.xmin establishes the smallest x value, the left end of the x axis.
xmax establishes the largest x value, the right end of the x axis.
This value must be larger than the value entered for Xmin.
xscl defines the spacing between tic marks along the x axis.
To turn off the marks, set Xscl to 0.
ymin establishes the smallest y value, the bottom of the y axis.
ymax establishes the largest y value, the top of the y axis.
This value must be larger than the value entered for Ymin.
yscl defines the spacing between tic marks along the y axis.
To turn off the marks, set Yscl to 0.
xres establishes how often the function is evaluated. The default setting is 2, meaning every 2 pixels. To change a setting, select that value using the cursor keys and type the desired value.