Question 759686
You are given the points ( 3,0 ) and ( 0, 3/5 )
Use the point-slope formula
{{{ ( y - 0 ) / ( x -3 ) = ( 3/5 - 0 ) / ( 0 - 3 ) 
{{{ y / ( x-3 ) = ( 3/5 ) / (-3) }}}
{{{ y / ( x-3 ) = -1/5 }}}
Multiply both sides by {{{ ( x-3 )*5 }}}
{{{ 5y = -( x-3 ) }}}
{{{ 5y = -x + 3 }}}
{{{ y = (-1/5)*x + 3/5 }}}
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check:
( 3,0 )
{{{ y = (-1/5)*x + 3/5 }}}
{{{ 0 = (-1/5)*3 + 3/5 }}}
{{{ 0 = 0 }}}
and
( 0,3/5 )
{{{ y = (-1/5)*x + 3/5 }}}
{{{ 3/5 = (-1/5)*0 + 3/5 }}}
{{{ 3/5 = 3/5 }}}
OK