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In the line \(y=\frac{4}{3}x-6\), how much should (x) increase to increase (y) by (24)?

Answer and explanation

Correct answer: 18

The slope is \(\frac{4}{3}\), meaning that for every increase of 3 units in \(x\), \(y\) increases by 4 units. Thus, \(\Delta y=\frac{4}{3}\Delta x\). Putting \(\Delta y=24\), we get \(24=\frac{4}{3}\Delta x\), so \(\Delta x=24\times\frac{3}{4}=18\). If \(x\) increased by 24, then \(y\) would increase by 32, not 24. Exam tip: In change-based questions, the constant term \(-6\) does not affect the change; use only the slope.

Related tags

Linear EquationsSlopeChange In VariablesCoordinate GeometryAlgebraSlope And Y InterceptIntroduction To PolynomialsMathematics

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