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If a student writes (9, 4) as (4, 9), what is the main mistake?

Answer and explanation

Correct answer: Writing coordinates in reverse order

The governing convention for an ordered pair is (x, y): the first coordinate gives horizontal displacement and the second gives vertical displacement. Thus (9, 4) means x = 9 and y = 4, whereas (4, 9) means a completely different point with x = 4 and y = 9. Writing one in place of the other reverses the coordinate order, so option B is correct. The error is not about naming axes, because the coordinates themselves have been interchanged. It is not about failing to draw a line, and option D describes a correct action rather than a mistake. Careful use of (x, y) prevents this error.

Related tags

CoordinatesOrdered PairsGraph ReadingGraphical Method Of Finding Solutions.Graphical Method Of Finding SolutionsPair Of Linear Equations In Two VariablesMathematicsClass 10 Mcq

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