Campaign Advertising Spending (X, in thousands of dollars) Sales Revenue (Y, in thousands of dollars)
1 4 40
2 3 50
3 4 62
4 5 48
5 6 75
6 8 82
7 8 88
8 9 90
9 9 95
10 11 105
11 10 110
12 13 115
13 5 80
14 6 89
15 8 80
16 9 90
17 10 100
18 12 120
19 13 130
20 9 70
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