Question 31107
First find the slope
{{{ (y2-y1)/(x2-x1) }}}
{{{ (1--3)/(4-6) }}}
{{{ 4/-2 }}}
{{{ -2/1 }}} plug this and one of the points into y=mx+b and solve for the y-intercept or b
{{{ y=mx+b }}}
{{{ 1=(-2)(4) + b }}}
{{{ 1=-8 + b }}}
{{{ 9 = b }}} plug b and the slope back into y=mx+b
{{{ y=-2x+9 }}} if you want it in Ax+By=C ... then continue on
{{{ 2x+1y=9 }}}