Ellen loves to wear socks with crazy patterns. She finds a great deal for these kinds of socks at her favorite store, Rock Those Socks.
There is a proportional relationship between the number of pairs of socks that Ellen buys, x,
and the total cost (in dollars), y.
x (pairs of socks) y (dollars)
4
$8
5
$10
9
$18
10
$20
What is the constant of proportionality? Write your answer as a whole number or decimal.
dollars per pair of socks
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