Question 1152234
Use the general point slope formula
{{{ ( y - 7020 ) / ( x - 4 ) = ( 14100 - 7020 ) / ( 0 - 4 ) }}}
{{{  ( y - 7020 ) / ( x - 4 ) = 7080 / (-4) }}}
{{{  ( y - 7020 ) / ( x - 4 ) = -1770 }}}
{{{ y - 7020 = -1770x + 7080 }}}
{{{ y = -1770x + 14100 }}}
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check answer:
( 4, 7020 )
{{{ y = -1770x + 14100 }}}
{{{ 7020 = -1770*4 + 14100 }}}
{{{ 7020 = -7080 + 14100 }}}
{{{ 7020 = 7020 }}}
OK