Calculator User Manual

Chapter 6: Graph Tools
107
06TOOLS.DOC TI-86, Chap 6, US English Bob Fedorisko Revised: 02/13/01 2:23 PM Printed: 02/13/01 3:01 PM Page 107 of 2206TOOLS.DOC TI-86, Chap 6, US English Bob Fedorisko Revised: 02/13/01 2:23 PM Printed: 02/13/01 3:01 PM Page 107 of 22
Drawing a Function, Tangent Line, or Inverse Function
For
DrawF
,
TanLn
, and
DrInv
,
expression
is in terms of
x
. When you select
DrawF
,
TanLn
, or
DrInv
from the
GRAPH DRAW
menu, it is pasted to the home screen or program editor. Upon
execution, the drawing is returned.
DrInv
draws the inverse of
expression
by plotting its
x
values on the y-axis and its
y
values on the x-axis.
DrInv
is available only in
Func
graphing mode.
DrawF
expression
TanLn(
expression
,
x
) DrInv
expression
DrawF x^3+.3x
2
+4x TanLn(y1,1.5) DrInv y1
Drawing Freehand Points, Lines, and Curves

Select
PEN
from the
GRAPH DRAW
menu.
6 / '
/ '

Move the cursor to where you want to
begin drawing.

Turn on the pen.

Draw whatever you want.

Turn off the pen.
" # ! $
b
" # ! $
b
To draw more points, lines, or curves, repeat steps 2 through 5. To cancel, press
:
.
For
DrawF
,
TanLn
, and
DrInv
, you can use as
expression
any variable to
which a valid expression is
stored (including deselected
equation variables).
In the illustrations,
y1=x^3+.3x
2
N
4x
is selected.
In the example, the function
y(x)=x^3+.3x
2
N
4x
is selected.
Also,
ZSTD
was executed.
To draw a diagonal line or
curve, turn on the pen, press
b b
, press
! $
(or
# "
, and so on), and repeat.