Question 1061731
I suggest you try this and compare to slope-intercept equation form:


Linear equation in standard form, {{{Ax+By=C}}};
{{{By=C-Ax}}}
{{{y=C/B-Ax/B}}}
{{{y=-Ax/B+C/B}}}
{{{highlight(y=-(A/B)x+C/B)}}}


Identify the corresponding parts to {{{y=mx+b}}}.


Use that to answer question #2.



You can use the same idea to help answer question #1.  You can keep everything in standard form if you want.  You need to know that the product of slopes of perpendicular lines is {{{-1}}}.