Graphing , , and and Writing in Interval Notation
The procedure for graphing linear inequalities and converting them into interval notation applies universally across different inequality types and numerical boundaries. For the strict inequality , an open parenthesis is drawn at to demonstrate exclusion, and the number line is shaded to the right; in interval notation, this is expressed as . For the non-strict inequality , a square bracket includes the boundary point, and the shading proceeds to the left, which is noted as . Finally, for the non-strict inequality , a square bracket is similarly placed at with shading extending to the right, yielding the interval . These examples parallel the same rule sets practiced with integer, decimal, and fractional endpoints.
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Ch.2 Solving Linear Equations - Intermediate Algebra @ OpenStax
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Graphing , , and and Writing in Interval Notation