TI-83 43
the ∆Tbl line. ∆Tbl is the amount by which x will change as you move from row to row in the
table. Suppose you want the value of x to change by one (1) as you move from row to row. Type
in 1 (if that is not already the value). Both the Indpnt and Depend settings should be on Auto. The
Table Setup screen should now appear as it does below.
Now press 2nd [TABLE]. (TABLE is second function on the GRAPH key.) The calculator should
display a table of values of x and Y1, as shown below.
The highlight is now on the initial value of x, which we had decided would be −3. Press the
Down Arrow key until the number 3 is highlighted. Now watch the screen as you press the Down
Arrow key once more. Note that the table has "scrolled" down one row: the old first row no longer
appears, all the other rows have moved up one, and a new last row (where x is 4) appears. Press
the Down Arrow key again to make the table scroll again. Try it a few more times. Try holding
down the Down Arrow key for a few seconds to see how the table continues to scroll downward
through larger values of x. Press the Up Arrow key until the top number is highlighted. Now
watch the screen as you press the Up Arrow key once more. Note that the table has scrolled up
one row. Press the Up Arrow key again to make the table scroll up again. Try it a few more times.
Try holding down the Up Arrow key for a few seconds. Note that the screen scrolls upward. The
first value of x we used was −3. You can scroll back to that starting point by using the Up Arrow
key. Note that if you get −3 to be the top number in the X column, you can continue to press the
Up Arrow key and have the table scroll up, showing more negative values of x. Any time you
want to leave the table and return to the Home screen, just press 2nd [QUIT].
There is yet another way to evaluate an expression on the TI-83 for your own list of values of
x, using the Table feature. Press 2nd [TblSet ] (the second function on the WINDOW key). Ignore the
values of TblStart and ∆Tbl for now, and use the arrow keys to move the blinking cursor to the line
headed Indpnt. Move the cursor over the word Ask and press ENTER. On the line headed Depend
move the cursor over the word Auto and press ENTER.
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