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If two lines have the same slope and the same intercept, how many solutions will their pair of equations have?

Answer and explanation

Correct answer: Infinitely many solutions

The governing idea is the graphical interpretation of a pair of linear equations. A line in slope-intercept form is y = mx + c, where m is its slope and c is its y-intercept. If two lines have both the same m and the same c, their equations describe exactly the same geometric line. Every point on that common line satisfies both equations, and a line contains infinitely many points. Therefore, the pair has infinitely many common solutions, making option C correct. Equal slopes with different intercepts would produce distinct parallel lines and no solution. Different slopes would produce one intersection and hence a unique solution. The origin is not necessarily on the common line.

Related tags

Class10Linear-EquationsGraphical-MethodInfinite-SolutionsConditions For SolvabilityPair Of Linear Equations In Two VariablesMathematicsClass 10 Mcq

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