Question 313484
{{{y=(-1/2)x-4}}}
x=_,-2,_,2,8
y=-1,_,-4,_,_
if y=-1 then {{{(-1)=(-1/2)x-4}}} add 4 
{{{3=(-1/2)x}}} multiply by -2  
{{{highlight(-6=x)}}}
if x=-2 then {{{y=(-1/2)(-2)-4}}}
{{{y=1-4}}}
{{{highlight(y=-3)}}}
if y=-4 then {{{(-4)=(-1/2)x-4}}} add 4 
{{{0=(-1/2)x}}}
{{{highlight(0=x)}}}
if x=2 then {{{y=(-1/2)(2)-4}}}
{{{y=-1-4}}}
{{{highlight(y=-5)}}}
if x=8 then {{{y=(-1/2)(8)-4}}}
{{{y=-4-4}}}
{{{highlight(y=-8)}}}
x=-6,-2,0,2,8
y=-1,-3,-4,-5,-8