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If the slope is (-6) and (m+c=4) in (y=mx+c), what is the (y)-intercept?

Answer and explanation

Correct answer: 10

In the line equation y=mx+c, m is the slope and c is the y-intercept. Since the slope is -6, m=-6. Substituting in m+c=4 gives -6+c=4, so c=10. Therefore, the y-intercept is 10. The option -10 may result from a sign error. Exam tip: isolate c carefully when finding the y-intercept.

Related tags

Linear EquationsSlopeY-InterceptSubstitutionCoordinate GeometrySlope And Y InterceptIntroduction To PolynomialsMathematics

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