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=.2Xò–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