Question 645414
1.)
{{{4x+3y=12}}}....easiest way is to find zeros

if {{{x=0}}}...=>...{{{4*0+3y=12}}}.=>...{{{3y=12}}}=>...{{{y=4}}}
if {{{y=0}}}...=>...{{{4x+3*0=12}}}.=>...{{{4x=12}}}=>...{{{x=3}}}

{{{x}}}|{{{y}}}
{{{0}}}|{{{4}}}
{{{3}}}|{{{0}}}
graph:
{{{4x+3y=12}}}...=>...{{{3y=-4x+12}}}=>...{{{y=-(4/3)x+4}}}

{{{ graph( 600, 600, -10, 10, -10, 10,-(4/3)x+4) }}} 

2.)  

{{{y= -2x+1}}}

if {{{x=0}}}...=>...{{{y=-2*0+1}}}.=>...{{{y=1}}}
if {{{y=0}}}...=>...{{{0=-2x+1}}}.=>...{{{2x=1}}}=>...{{{x=1/2}}}

{{{x}}}|{{{y}}}
{{{0}}}|{{{1}}}
{{{1/2}}}|{{{0}}}

{{{ graph( 600, 600, -10, 10, -10, 10,-2x+1) }}}