1. SJS Company has been selling to retail customers in the Metro Manila area. They advertise
extensively on radio, print ads, and in the internet. The owner would like to review the
relationship between the amount spent on advertising expense ( in 1000s) and sales (in ₱000s).
Below is information on advertising expense and sales for the last 9 months.
Month Jan Feb Mar Apr May Jun Jul Aug Sept
Advertising
Expense 10 14 12 9 13 15 8 13 16
Sales
Revenue 180 170 190 220 235 208 215 175 250
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