Inequality Regions
eight levels, click to reveal
Difficulty
The region $R$ that satisfies the inequalities is shaded. A solid boundary line is included ($\le$ or $\ge$); a dashed one is not ($<$ or $>$).
1 · Is the point in the region?
2 · Solid or dashed, which side?
3 · Inequalities for a region: horizontal and vertical lines
4 · One sloping line with horizontal and vertical lines
5 · Two sloping lines
6 · Integer points in a region
7 · Real-life inequalities
8 · Real-life: best value at an integer point
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