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A line \(y=mx+c\) is shifted 4 units upward without changing its slope. Which parameter changes in the equation?

Answer and explanation

Correct answer: \(c\)

After shifting upward by 4 units, the equation becomes \(y=mx+(c+4)\). Thus, \(c\), the y-intercept, changes, while \(m\) remains unchanged because the line’s steepness is unchanged. Exam tip: a vertical shift changes only the constant term.

Related tags

Linear EquationsSlopeY-InterceptCoordinate GeometryGraph TransformationsSlope And Y InterceptIntroduction To PolynomialsMathematics

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