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If a₁/a₂ ≠ b₁/b₂, how many solutions will the pair have graphically?

Answer and explanation

Correct answer: Exactly one solution

For the pair a₁x + b₁y + c₁ = 0 and a₂x + b₂y + c₂ = 0, the condition a₁/a₂ ≠ b₁/b₂ means that the corresponding coefficients are not proportional in the same way. Consequently, the two lines have different slopes. Two distinct straight lines with different slopes must intersect at one and only one point, and that common point is the unique ordered-pair solution of the pair. Therefore option B is correct. Such a pair is called consistent and independent. Option A applies to distinct parallel lines, where a₁/a₂ = b₁/b₂ but c₁/c₂ is different. Option C applies to coincident lines, where all three ratios are equal. Two ordinary straight lines cannot have exactly two distinct intersection points, so option D is impossible.

Related tags

Unique-SolutionCoefficient-RatiosIntersecting-LinesGraphical Method Of Finding Solutions.Graphical Method Of Finding SolutionsPair Of Linear Equations In Two VariablesMathematicsClass 10 Mcq

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