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Exit VCEDump ISEE-TEST Independent School Entrance Examination

Q20 Single choice

Lucy is ordering some books online. There is a flat shipping fee for the first book she orders, and an additional charge for every extra book. This is represented by the formula y = 0.75(x - 1) + 7, where y is the total shipping cost and x is the total number of books ordered.

What is the meaning of 0.75 in this formula?

A
For every dollar it costs to ship, there are 0.75 books being mailed.
B
For every book bought, the shipping cost is $6.25.
C
For every extra book bought after the first, shipping costs an additional $0.75 per book.
D
When 7 books are bought, the shipping cost is $0.75.

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