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In the line \(y=-\frac{5}{3}x+7\), how much will (y) change when (x) increases by (3)?

Answer and explanation

Correct answer: Decreases by 5

The slope of the line is \(-\frac{5}{3}\). This means that for every increase of 3 units in \(x\), \(y\) decreases by 5 units. Thus, \(\Delta y=-\frac{5}{3}\times 3=-5\), so \(y\) decreases by 5. In option B, 3 is the denominator of the slope, while 7 is only the y-intercept and does not affect the change. Exam tip: use \(\Delta y=m\Delta x\) to find the change in \(y\).

Related tags

Linear EquationsSlopeNegative SlopeChange In YCoordinate GeometrySlope And Y InterceptIntroduction To PolynomialsMathematics

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