Question: Consider the following sample data for the relationship between advertising budget and sales for Product A: Observation 1 2 3 4 5 6 7 8

Consider the following sample data for the relationship between advertising budget and sales for Product A:
Observation 12345678910
Advertising ($)80,00080,00090,000100,000100,000110,000120,000120,000130,000140,000
Sales ($)499,000477,000546,000614,000623,000653,000747,000714,000785,000858,000
What is the slope of the "least-squares" best-fit regression line?

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