Question 1144843
{{{ ( y - 2 ) / ( x -(-1) ) = m }}}
Find {{{ m }}}
{{{ y = m*x + b }}}
{{{ y = 2x - 3 }}}
{{{ m = 2 }}}
{{{ ( y - 2 ) / ( x -(-1) ) = 2 }}}
{{{ ( y - 2 ) / ( x + 1 ) = 2 }}}
{{{ y - 2 = 2*( x + 1 ) }}}
{{{ y - 2 = 2x + 2 }}}
{{{ y = 2x + 4 }}}
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check:
Does the line go through ( -1,2 )
{{{ 2 = 2*(-1) + 4 }}}
{{{ 2 = -2 + 4 }}}
{{{ 2 = 2 }}}
OK