Question 1155601
You are given the points:
( 0, 100 )
( 7, 75.5 )
Use the general point-slope formula
{{{ ( y - 100 ) / ( x - 0 ) = ( 75.5 - 100 ) / ( 7 - 0 ) }}}
{{{ ( y - 100 ) / ( x - 0 ) = -24.5 / 7 }}}
{{{ ( y - 100 ) / x = -3.5 }}}
{{{ y - 100 = -3.5x }}}
{{{ y = -3.5x + 100 }}}
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check:
( 0,100 )
{{{ 100 = -3.5*0 + 100 }}}
{{{ 100 = 100 }}}
and
( 7, 75.5 )
{{{ 75.5 = -3.5*7 + 100 }}}
{{{ 75.5 = -24.5 + 100 }}}
{{{ 75.5 = 75.5 }}}
OK