A clothing business finds there is a linear relationship between the number of shirts,
n
,it can sell and the price,
p
, it can charge per shirt. In particular, historical data shows that
1000
shirts can be sold at a price of
$
26
, while
4000
shirts can be sold at a price of
$
11
. Give a linear equation in the form
p
=
m
n
+
b
that gives the price
p
they can charge for
n
shirts.