Texas Instruments TI-83 - Section 11.8 Systems of Linear Inequalities; Linear Programming; Example 2 Graphing a Linear Inequality Using a Graphing Utility

Section 11.8 Systems of Linear Inequalities; Linear
Programming
EXAMPLE 2 Graphing a Linear Inequality Using a Graphing Utility
Use a graphing utility to graph
360xy
+−≤
.
SOLUTION
Graph
1
36Yx
=−+
(this is obtained by solving 3x + y - 6 = 0 for y). Use the same
viewing window as that used in the text.
Now test the point (-1, 2) by typing the following:
The asterisk is the multiplication symbol.
We now need the inequality. It can be found in the TEST menu (this is a second function
located above the MATH button):
Once you select the TEST menu you should obtain the following on your screen:
TEST
menu