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TI-83 Plus Activities 567
4. Press
q
6
to graph the inequality in the standard window.
5. Press
r
†
†
to move to
Y6
. Then press
|
and
~
to trace the
inequality, observing the value of
Y
.
6. Press
o
. Turn off
Y4
,
Y5
, and
Y6
. Enter equations to graph only the
inequality.
7. Press
r
. Notice that the values of
Y7
and
Y8
are zero where the
inequality is false.