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Select 6: < by pressing 6 or scrolling down and highlighting 6 and then pressing
ENTER. You should now have the following on your home screen:
Finally, press 0 and hit ENTER:
The 1 as output means the statement is true so that (-1, 2) is a solution to the inequality.
Therefore, we shade the side containing (-1, 2). The side containing (-1, 2) is below the
line. To shade below the line go back to the Y= menu:
Place
cursor here
Notice to the left of Y
solid line as shown above. While the cursor is in this location press ENTER. You should
notice the line style changes to a thick line. Pressing ENTER a second time causes the
, there is a solid line. Use the arrows to place the cursor on the
1
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