Shelby, Allen, and Denise printed their digital photos. Each requested the same size prints. Shelby paid $2.70 for 5 prints. Allen paid $3.24 for 11 prints. Denise paid $4.05 for 20 prints

Question

Mathematics

Sherman

9 February, 00:47

Shelby, Allen, and Denise printed their digital photos. Each requested the same size prints. Shelby paid $2.70 for 5 prints. Allen paid $3.24 for 11 prints. Denise paid $4.05 for 20 prints

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Answers (1)

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Salma Chaney · Answer 1

Person: Number of prints Total Cost

Shelby 5 2.70

Allen 11 3.24

Denise 20 4.05

To solve for the variable cost:

11 - 5 = 6

3.24 - 2.70 = 0.54

0.54 / 6 = 0.09 per print

To solve for the fixed cost

0.09 x 5 = 0.45

2.70 - 0.45 = 2.25

y = 2.25 + 0.09x

y = 2.25 + 0.09 (5) = 2.25 + 0.45 = 2.70

y = 2.25 + 0.09 (11) = 2.25 + 0.99 = 3.24

y = 2.25 + 0.09 (20) = 2.25 + 1.8 = 4.05