Writing the Inequality from Its Graph
To determine the linear inequality for a given graph with a known boundary line, one must identify the correct inequality symbol and ascertain whether the boundary is included. Consider a graph where the boundary line is given by the equation , drawn as a solid line, with the shaded solution region occupying the top-left half-plane. This boundary line divides the coordinate plane into two regions: one satisfying and the other satisfying . To determine which mathematical condition applies to the shaded area, a convenient test point that is not on the line—such as the origin —is selected. Substituting and into the inequality yields , which simplifies to the true statement . Because the condition holds true, the half-plane containing represents the solution set for . Furthermore, the solid boundary line visually indicates that points exactly on the line are included in the solution set, requiring the use of a non-strict inequality symbol. Combining these facts, the graph represents the complete inequality .
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Writing the Inequality from Its Graph
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Writing the Inequality from Its Graph
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Writing the Inequality from Its Graph
Writing the Inequality from Its Graph