This online exercise helps you to establish the link between the inequalities and plane regions. It can either plot a region and ask you to recognize the corresponding inequality among a list to choose from, or give an inequality and ask you to recognize the plane region it describes.

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Please take note that WIMS pages are interactively generated; they are not ordinary HTML files. They must be used interactively ONLINE. It is useless for you to gather them through a robot program.

- Description: recognize a plane region described by inequalities. This is the main site of WIMS (WWW Interactive Multipurpose Server): interactive exercises, online calculators and plotters, mathematical recreation and games
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