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7-6 Draw Operations
DRAWF (draw function) draws a function on the current graph. DRAWF must be
entered on the Home screen or in the program editor.
DRAWF
(draw function,
DRAW DRAW
, item 5) is not an
interactive operation. It draws the specified expression as a
function in terms of
X
on the current graph.
DRAWF
expression
For example, if
Y1=.2X
ò
–2X+6
is the only selected function,
DRAWF Y1–5
plots
Y1
and then draws the function
Y1–5
when you press
¸
.
Note: You cannot trace on
DRAWF
functions.
GRIDON
(
DRAW DRAW
, item 9) and
GRIDOFF
(
DRAW DRAW
, item 0) set graphs to be drawn with the grid
points on or off, respectively. The grid points correspond to
the axes tick marks. The default for the TI-80 is
GRIDOFF
.
1. From the Home screen, press
2
F
to display the
DRAW
menu.
2. Press
9
to select
GRIDON
, or press
0
to select
GRIDOFF
.
3. Press
¸
. The message
DONE
is displayed. The next
time the graph is displayed, the grid points will be on if
you selected
GRIDON
, or off if you selected
GRIDOFF
.
Drawing a Function
Drawing a
Function
Using GRIDON
and GRIDOFF