Question

It appears that over the past 50 years, the number of farms in the United States declined while the average size of farms increased. The following data provided by the U.S. Department of Agriculture show five-year interval data for U.S. farms. Use these data to develop the equation of a regression line to predict the average size of a farm   by the number of farms  Discuss the slope and y-intercept of the model.

Year	Number of Farms (millions)	Average Size (acres)
1960	5.64	208
1965	4.62	256
1970	3.99	294
1975	3.32	344
1980	2.95	378
1985	2.51	420
1990	2.41	427
1995	2.24	443
2000	2.14	463
2005	2.06	468
2010	2.18	435
2015	2.09	442

(Do not round the intermediate values. Round your answers to 2 decimal places.)

       

Appendix A Statistical Tables

Answer 1