8. In the data "demog data.csv", if you model the "INCTOT" variable as a linear function of the "AGE" variable, what slope and intercept give the line with the least squares best fit? (You may use a built-in function for this or the formulas derived in class) (10 points) This question uses 2018 data primarily for Denver county accessed through IPUMS- USA, University of Minnesota, www.ipums.org, Steven Ruggles, Sarah Flood, Ronald Goeken, Josiah Grover, Erin Meyer, Jose Pacas and Matthew Sobek. IPUMS USA: Version 9.0 [dataset]. Minneapolis, MN: IPUMS, 2019. https://doi.org/10.18128/D010.V9.0 The PUMA-to-county restriction was done using MABLE, http://medc.missouri.edu/websas/geocorr12.html. The data are restricted to women in the age range 30-80 in PUMAs primarily in Denver