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Lynna [10]
3 years ago
13

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
Mathematics
2 answers:
Elis [28]3 years ago
7 0

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

nekit [7.7K]3 years ago
4 0

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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