Answer:
7 / 2
Explanation:
Given that:
2 skeins of yarn = $7
7 α 2
7 = 2k
2k = $7
k = constant of proportionality
Make k the subject
Divide bith sides by 2
k = 7/2
To test the correctness of k
8 skeins cost $28
Thus,
8 * k should equal 28
8 * 7/2 = 56/2 = 28