Sales, in millions of pesos, of a certain company as shown as follows.   Year 1 2 3 4 5 6 7 8 9 10 Sales ₱ 12 ₱ 15 ₱ 17 ₱ 18 ₱ 16 ₱ 19 ₱ 21 ₱ 20 ₱ 22 ₱ 24   Determine the following: regression equation sum of squares for error standard error coefficient of determination

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