Question 1141141
{{{ ( 1 -(-9) ) / ( 0  - x ) = -4 }}}
This is [ change in y ] / [ change in x ] = slope
{{{ 10 / (-x) = -4 }}}
{{{ 10 = -4*(-x) }}}
{{{ 10 = 4x }}}
{{{ x = 2.5 }}}
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Check answer:
{{{ 10 / ( 0 - 2.5 ) = -4 }}}
{{{ 10 = 10 }}}
OK