Consider the following sample data for the relationship between advertising budget and sales for Product A:

Observation $12345678910$

Advertising $($$$)80,000,80,000,90,000,100,000,100,000,110,000,120,000$ Consider the following sample data for the relationship between advertising budget and sales for Product A:

What is the slope of the "least$-$squares" best$-$fit regression line?

Please round your answer to the nearest hundredth.

Note that the correct answer will be evaluated based on the full$-$precision result you would obtain using Excel$\mathrm{.}120,000130,000140,000$

Sales $($$$)499,000477,000546,000614,000623,000653,000747,000714,000785,000858,000$

What is the slope of the "least$-$squares" best$-$fit regression line?