TI-83 Plus Draw Instructions 226
Shading Areas on a Graph
Shading a Graph
To shade an area on a graph, select 7:Shade( from the DRAW menu. The
instruction is pasted to the home screen or to the program editor.
Shade( draws lowerfunc and upperfunc in terms of X on the current graph
and shades the area that is specifically above lowerfunc and below
upperfunc. Only the areas where lowerfunc < upperfunc are shaded.
Xleft and Xright, if included, specify left and right boundaries for the
shading. Xleft and Xright must be numbers between Xmin and Xmax,
which are the defaults.
pattern specifies one of four shading patterns.
pattern
=
1vertical (default)
pattern
=
2horizontal
pattern
=
3negative—slope 45¡
pattern
=
4positive—slope 45¡