Extend: Graphing Technology Lab, Graphing Inequalities
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Remember to instruct the calculator that you are dealing with an inequality.
Graph:
Example Solutions: (2,3), (3,5), (4,6), (0,8)
To draw an inequality, we press Y= on our calculator and write the right-hand side of the inequality on the first row.
Next, we have to instruct the calculator that we are dealing with an inequality. We place the cursor before Y_1 and, by pressing ENTER, we scroll until we select the icon that displays a black triangle pointing up and to the right. This instructs the calculator that we are dealing with a ≥ inequality.
To draw the inequality, we press GRAPH.
Almost all points in the 1^\text{st} Quadrant are part of the solution set. The points below are in the 1^\text{st} Quadrant and part of the solution. (2,3), (3,5), (4,6), (0,8) Note that the solution set includes infinitely many points. Here we are only showing four of them.