Question 661646
{{{ 3x - y = 9 }}}
Add {{{y}}} to both sides
{{{ 3x = 9 + y }}}
Subtract {{{9}}} from both sides
{{{ 3x - 9 = y }}}
Write it the other way around
{{{ y = 3x - 9 }}}
1st make {{{ x = 0 }}}
{{{ y = 3*0 - 9 }}}
{{{ y = -9 }}}
(0,-9) is the 1st point
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Make {{{ y = 0 }}}
{{{ 0 = 3x - 9 }}}
{{{ 3x = 9 }}}
{{{ x = 3 }}}
(3,0) is the 2nd point
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Here's the plot
{{{ graph( 400, 400, -5, 10, -12, 5,  3x - 9 ) }}}