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While drawing the graph of y = -2x + 6, a student says that the line rises by 2 units as we move to the right. Which is the correct correction of the student's error?

Answer and explanation

Correct answer: The line goes down by 2 units for every 1 unit move to the right and cuts the y-axis at 6.

In y = mx + c, m is the slope and c is the y-intercept. Here m = -2, so y decreases by 2 when x increases by 1; c = 6. Exam tip: always check the sign of the slope.

Related tags

Linear EquationsSlopeY-InterceptCoordinate GeometryGraph InterpretationError AnalysisSlope And Y InterceptIntroduction To Polynomials

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