Question 718267
{{{ y = -(1/3)*x + 6 }}}
(3,5), and (6,4)
You have 2 more points that are easy to 
calculate:
{ x, 0 ) and ( 0, y )
When {{{ y = 0 }}},
{{{ 0 = -(1/3)*x + 6 }}}
{{{ (1/3)*x = 6 }}}
{{{ x = 18 }}}
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and, also
(0,y)
{{{ y = -(1/3)*0 + 6 }}}
{{{ y = 6 }}}
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So, you have 2 more points,
(18,0) and ( 0,6 )
Here's what the line looks like:
{{{ graph( 400, 400, -6, 24, -6, 10, -(1/3)*x + 6 ) }}}