Lucy is knitting a blanket and needs to buy some more yarn. At her local craft store, 2 skeins of yarn cost $7 and 8 Skeins of y
arn cost $28. Which equation represents this direct variation
2 answers:
Answer:
7 / 2
Step-by-step 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
Answer: 7/2
Step-by-step explanation: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
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