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If the line (y=mx-4) passes through ( (2,6) ), what is the slope?

Answer and explanation

Correct answer: 5

Since the point (2,6) lies on the line y=mx-4, substitute x=2 and y=6: 6=2m-4. Hence, 2m=10 and m=5. The value 4 could result from using the constant term -4 with an incorrect sign. Exam tip: When a point lies on a line, substitute both its coordinates directly into the equation.

Related tags

Linear EquationsSlopeY-InterceptSubstitutionCoordinate GeometrySlope And Y InterceptIntroduction To PolynomialsMathematics

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