9 terms

Boundary

A line or curve that separates the coordinate plane into regions.

Closed half-plane

The solution of a linear inequality that includes the boundary line.

Compound inequality

Two or more inequalities that are connected by the words "and" or "or".

Half-plane

The region of the graph of an inequality on one side of the boundary.

Inequality

An open sentence that contains an inequality symbol.

Intersection

The graph of a compound inequality containing "and"; the solution is the set of elements common to both inequalities.

Open half-plane

The solution of a linear inequality that does not include the boundary line.

Set-builder notation

A concise way of writing a solution set. {x I x<7}

Union

The graph of a compound inequality containing "or"; the solution is a solution of either inequality, not necessarily both.