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If (y=(k-7)x+6) and (y=4x+(k-1)) have equal slopes, what is (k)?

Answer and explanation

Correct answer: 11

In the form y = mx + c, the coefficient of x, m, is the slope. The slopes of the two lines are k - 7 and 4 respectively. Since the slopes are equal, k - 7 = 4, so k = 11. If k were 12, the first slope would be 5, not 4. Exam tip: when comparing slopes, equate only the coefficients of x.

Related tags

Slope Of A LineLinear EquationsParameterValue Of KCoordinate GeometrySlope And Y InterceptIntroduction To PolynomialsMathematics

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