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Subjects
Class 9MathematicsIntroduction to PolynomialsSlope and y-interceptMedium
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Which statement about the lines (y=4x+7) and (y=4x-2) is correct?

Answer and explanation

Correct answer: Both lines have the same slope

In the form y = mx + c, the coefficient m of x is the slope. The coefficient of x is 4 in both equations, so the two lines have the same slope and are parallel. Their y-intercepts are 7 and -2 respectively, so option B is incorrect. Exam tip: To find the slope in y = mx + c, identify the coefficient of x.

Related tags

SlopeY-InterceptLinear EquationsParallel LinesCoordinate GeometrySlope And Y InterceptIntroduction To PolynomialsMathematics
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10 more MCQs
  1. 1What is the slope of the line (y=2x+5)?
  2. 2What is the (y)-intercept of the line (y=3x-4)?
  3. 3What is the slope of the line (y=-x+7)?
  4. 4What is the slope of the line (y=8-2x)?
  5. 5What is the (y)-intercept of the line (y=x+9)?
  6. 6What is the slope of the line (y=5x)?
  7. 7What is the (y)-intercept of the line (y=-6)?
  8. 8In the form (y=mx+c), what does (m) represent?
  9. 9In the form (y=mx+c), what does (c) represent?
  10. 10Which line has slope (4) and (y)-intercept (1)?
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