Question 438287
(4,4)
{{{ m = -5/7 }}}
The formula is:
{{{ (y - 4) / (x - 4) = -5/7 }}}
Multiply both sides by {{{ 7*(x-4) }}}
{{{ 7*(y - 4) = -5*(x - 4) }}}
{{{ 7y - 28 = -5x + 20 }}}
{{{ 7y =-5x + 48 }}}
{{{ y = (-5/7)*x + 48/7 }}}
check:
Does the line go through (4,4) ?
{{{ y = (-5/7)*x + 48/7 }}}
{{{ 4 = (-5/7)*4 + 48/7 }}}
{{{ 28 = -20 + 48 }}}
OK