Question 1084152
Use the general poit-slope formula
{{{ ( y -(-1) ) / ( x - 5 ) = -2 }}}
{{{ y + 1 = -2*( x - 5 ) }}}
{{{ y + 1 = -2x + 10 }}}
{{{ y = -2x + 9 }}}
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check:
Does it go through ( 5, -1 ) ?
{{{ -1 = -2*5 + 9 }}}
{{{ -1 = -10 + 9 }}}
{{{ -1 = -1 }}}
OK