Essay

Recalling Boundary Line Styles and Test Point Rules for Linear Inequalities

You are documenting a workflow for your operations team to help them interpret resource constraint graphs. One of the graphs is bounded by the solid boundary line ${}3x - y = 6$, where the shaded region represents the feasible solution set.

To ensure your team can correctly deduce the inequality from the graph, write an explanation that addresses the following points:

  1. Explain what a solid boundary line indicates about the inequality symbols to be used.
  2. If you choose the origin (0, 0) as a test point and it lies in the unshaded region, state whether substituting its coordinates into the correct inequality must yield a true or a false statement.
  3. Show the evaluation of the expression ${}3x - y$ at the origin (0, 0) and explain how this confirms that ${}3x - y \geq 6$ is the correct inequality representing the shaded solution region.

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Updated 2026-06-17

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