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What is the slope of the boundary line for y<-1/2 x+4?

Answer and explanation

Correct answer: -1/2

For a linear boundary written in slope-intercept form y=mx+c, the coefficient m of x is the slope and c is the y-intercept. Replacing the strict inequality with equality gives the boundary line y=-(1/2)x+4. Comparing this with y=mx+c shows m=-1/2, so option A is correct. The inequality sign tells us which side of the line is shaded and, because it is strict, the boundary is dashed; it does not alter the slope. Option B, 4, is the y-intercept, not the slope. Option C loses the negative sign, which would change the line’s direction. Option D incorrectly treats the constant term as a negative slope. Thus the line decreases as x increases: an increase of 2 in x produces a decrease of 1 in y, confirming the slope -1/2.

Related tags

SlopeBoundary LineSlope-Intercept FormGraphical Solution Of Linear Inequalities In Two VariablesLinear InequalitiesMathematicsClass 11 Mcq

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