Answer
See below.
Work Step by Step
A line in the form $y=mx+b$ has slope $m$.
Hence here $Ax+By=C\\By=C-Ax\\y=-\frac{A}{B}x+\frac{C}{B} $
Thus the slope is $-\frac{A}{B}$.
The y-intercept is when $x=0$, thus $A(0)+By=C\\y=\frac{C}{B}$
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