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In the line (y=9x+8), by how much does (y) increase when (x) increases by (1)?

Answer and explanation

Correct answer: 9

In the form y=mx+c, m is the slope. Here, the coefficient of x is 9, so when x increases by 1, y increases by 9. The number 8 is the y-intercept; it does not represent the rate of increase of y. Exam tip: in y=mx+c, the coefficient of x is the slope.

Related tags

SlopeLinear EquationRate Of ChangeY-InterceptCoordinate GeometrySlope And Y InterceptIntroduction To PolynomialsMathematics

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