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What types of boundary lines will the graph of x≤5 and y>1 have?

Answer and explanation

Correct answer: x=5 solid and y=1 dashed

The boundary-line rule depends on whether equality is included. For x≤5, the boundary is x=5, and the symbol ≤ includes equality, so x=5 must be drawn as a solid line. For y>1, the boundary is y=1, but the strict symbol > excludes equality, so y=1 must be drawn as a dashed line. Hence option A is correct. The shading for x≤5 is on the left side of the vertical line x=5, while the shading for y>1 is above the horizontal line y=1; their intersection is the solution region. Option B incorrectly treats the strict inequality as inclusive. Option C incorrectly excludes the boundary for x≤5. Option D reverses the two line types. Remember that the line style is determined by the inequality symbol, not by whether the boundary is vertical or horizontal.

Related tags

Solid And Dashed LinesGraphical InequalitiesBoundaryGraphical Solution Of Linear Inequalities In Two VariablesLinear InequalitiesMathematicsClass 11 Mcq

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