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Subjects
Class 9MathematicsIntroduction to PolynomialsSlope and y-interceptHard
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If (c=-9) and (m-c=16) in (y=mx+c), what is the slope?

Answer and explanation

Correct answer: 7

In the form (y=mx+c), m represents the slope. Given (m-c=16) and (c=-9), we get (m-(-9)=16), or (m+9=16). Hence, (m=7), so 7 is the correct option. If m were 8, then (m-c=8-(-9)=17), not 16. Exam tip: subtracting a negative value changes it to addition.

Related tags

Linear EquationsSlopeY-InterceptAlgebraic SubstitutionCoordinate 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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