The cost will double for the speedy printer.
The cost will not double for one-time printer.
Given the cost, C, for printing n school yearbooks for two different companies, expressed as:
Speedy Printers: C = 29n
On-time Printers: C = 100 +25n
If the number of yearbooks ordered is doubled for the speedy printer, the new cost will be;
Cn = 29(2n)
Cn = 58n
Cn = 2(29n)
Cn = 2C
This shows that the cost will double for the speedy printer.
For one-time printer:
On-time Printers: C = 100 +25n
If the number of yearbooks is doubled, the new cost will be expressed as:
Cn = 100 + 25(2n)
Cn = 100 + 50n
Since we can not write the new cost as a function of the original cost, hence the cost will not double for one-time printer.
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