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Which statement is correct for a consistent pair?

Answer and explanation

Correct answer: It has at least one solution

The direct answer is option A: a consistent pair has at least one solution. In a pair of linear equations, consistency means that the two equations share at least one ordered pair (x,y). There are two consistent possibilities: intersecting lines have exactly one common point, while coincident lines have infinitely many common points. Option A correctly includes both cases. Option B describes an inconsistent pair, whose lines are parallel and distinct. Option C is not correct because distinct parallel lines are always inconsistent, not consistent. Option D is wrong in two ways: a pair need not have zero solutions, and the phrase only (0) solutions is not a standard result; even if the origin is one solution, there may be another or infinitely many. A useful exam cue is that consistent means ‘common solution exists’; independent usually means one solution, and dependent usually means infinitely many.

Related tags

Linear EquationsConsistentConcept

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