In 2016, demographers reported that deaths outnumbered births among white Americans in more than half the states in the U.S. (The New York Times, June 20, 2018). Consider the white American population, in millions, from 2005 through 2017; a portion of the data is shown in accompanying table. 

a. Use the scatterplot to explore linear and quadratic trends; the cubic trend is not considered. Which trend model do you think describes the data better? 

b. Validate your intuition by comparing adjusted R² of the two models. Use the preferred model to forecast the white population in 2018 and 2019.

Transcribed Image Text:

Year 2005 2006 ⠀ 2017 Whites 215.33 221.33 I 235.51