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If the slope is (-3) and (m+c=5) in (y=mx+c), what is the (y)-intercept?

Answer and explanation

Correct answer: 8

In the form y=mx+c, m is the slope and c is the y-intercept. Given m=-3, substitute it into m+c=5: -3+c=5, so c=8. Therefore, the y-intercept is 8. The value -8 can result from a sign error; moving -3 to the other side means adding 3. Exam tip: isolate c to find the y-intercept.

Related tags

Slope Intercept FormLinear EquationsY-InterceptSubstitutionCoordinate GeometrySlope And Y InterceptIntroduction To PolynomialsMathematics

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