## Precalculus (6th Edition) Blitzer

The statement does not make sense. The slope of the line whose equation is $Ax+By = C$ can be determined by solving for $y$ in terms of $x$: $By = -Ax + C \\y = \dfrac{-Ax+C}{B} \\y = \dfrac{-A}{B}x + \dfrac{C}{B}$ Thus, the slope of the line is $-\dfrac{A}{B}$.