Question 1055600
Let {{{ n }}} = the number of $1 increases in price
{{{ m(n) = 3000 - 500n }}}
( note that {{{ m(0) = 3000 }}} )
The slope is {{{ -500 }}}
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Here's the plot. Note that {{{ n <= 6 }}}, because
when {{{ n=6 }}}, they sell no milk.
{{{ graph( 400, 400, -2, 8, -350, 4000, -500x + 3000 ) }}}