please give detailed explanation with simple steps. Thank you.

Save & EX The accompanying data file shows the square footage and associated property taxes for 20 homes in an affluent suburb 30 miles outside New York City. Click here for the Excel Data File a. Estimate a home's property taxes as a linear function of the size of the home (measured by its square footage). (Round your answers to 2 decimal places.) ak Property Taxes ences Size. b. What proportion of the sample variation in property taxes is explained by answer into 2 decimal places.) home's size? (Round your Proportion of the sample variation %