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What is the point of intersection of the lines y = -1 and 3x - 2y = 11 on the graph?

Answer and explanation

Correct answer: (3, -1)

The line y = -1 is horizontal, so the y-coordinate of the intersection must be -1. Substituting y = -1 in the second equation gives 3x - 2(-1) = 11, or 3x + 2 = 11, hence x = 3. Therefore, the intersection point is (3, -1). In option B, the coordinates are reversed, while option D has the correct y-coordinate but 3(5) - 2(-1) = 17, not 11. Exam tip: always substitute the obtained point into both equations to verify it.

Related tags

Linear EquationsGraphical MethodIntersection Of LinesHorizontal LineGraphical Method Of Finding Solutions.Graphical Method Of Finding SolutionsPair Of Linear Equations In Two VariablesMathematics

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