Question 1088626
Use the point-slope formula
{{{ ( h - 3 ) / ( -8 -(-9) ) = 7 }}}
{{{ ( h - 3 ) / ( -8 + 9 ) = 7 }}}
{{{ h - 3 = 7 }}}
{{{ h = 10 }}}
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check:
{{{ ( h - 3 ) / ( -8 -(-9) ) = 7 }}}
{{{ ( 10 - 3 ) / ( -8 -(-9) ) = 7 }}}
{{{ 7 / 1 = 7 }}}
{{{ 7 = 7 }}}
OK