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If (y=(b-13)x+(3b+1)) has slope (4), what is the (y)-intercept?

Answer and explanation

Correct answer: 52

In the form \(y=mx+c\), the coefficient of \(x\) is the slope. Thus, \(b-13=4\), giving \(b=17\). The \(y\)-intercept is the constant term \(3b+1\): \(3(17)+1=52\). Therefore, 52 is correct. The value 51 would result from using only \(3b\) and missing the \(+1\). Exam tip: first find the parameter from the slope, then substitute it into the constant term.

Related tags

Linear EquationsSlopeY-InterceptParameterCoordinate GeometrySlope And Y InterceptIntroduction To PolynomialsMathematics

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