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Is the point (2,3) in the solution region of x+2y≤8?

Answer and explanation

Correct answer: Yes, because 2+2(3)≤8

To determine whether a point is in a linear-inequality region, substitute its coordinates into the complete inequality, not merely into part of the expression. For (x,y)=(2,3), x+2y=2+2(3)=2+6=8. Since 8≤8 is true, the point is included. It lies exactly on the boundary line x+2y=8, and the symbol ≤ includes equality; therefore option A is correct. Option B reverses the numerical result and incorrectly claims that 8 is greater than 8. Option C uses x+y instead of the required weighted expression x+2y. Option D compares the coordinates, which is unrelated to the stated inequality. A graph would show the point on the solid boundary, not outside the feasible region.

Related tags

Boundary PointLinear InequalityPoint VerificationGraphical Solution Of Linear Inequalities In Two VariablesLinear InequalitiesMathematicsClass 11 Mcq

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