Texas Instruments TI-83 PLUS - Manual (Page 309)

TI-83 Plus Lists 306
5. Press | and ~ to move the cursor to the stat plot data point that you
want as the left bound.
6. Press Í . A 4 indicator on the graph screen shows the left bound.
Right Bound? is displayed in the bottom-left corner.
7. Press | or ~ to move the cursor to the stat plot point that you want for
the right bound, and then press Н .