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Subjects
Class 9MathematicsIntroduction to PolynomialsSlope and y-interceptMedium
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What is the value of (y) at (x=0) in the line (y=16-8x)?

Answer and explanation

Correct answer: 16

Substituting x=0 in the equation gives y=16-8(0)=16. Therefore, the value of y at x=0 is 16; this is also the y-intercept. The value -8 is the slope, or coefficient of x, not the value of y. Exam tip: To find the y-intercept, always put x=0.

Related tags

Linear EquationsY-InterceptSlopeSubstitutionCoordinate 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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