Question

The following data set provides information on acres harvested and planted by year and value in the US.

Year	ASPARAGUS - ACRES HARVESTED	ASPARAGUS - ACRES PLANTED
2015	21,700	23,500
2014	23,800	25,800
2013	24,500	26,800
2012	25,300	27,800
2011	26,800	28,400
2010	28,000	29,200
2009	29,200	30,700
2008	32,200	33,700
2007	38,600	40,900
2006	43,200	44,700
2005	49,300	51,700
2004	61,500	66,000
2003	58,000	62,000
2002	66,000	70,500
2001	70,150	75,150
2000	77,400	82,800
1999	75,890	79,590
1998	74,430

From the data set, use the planting data for the United States for recent years. Using a calculator or statistical software, find the equation for the linear regression line for 2010 to 2015. What is its slope?

• Round your final answer to one decimal place.

Answer 1

In order to solve this question I used R software.

R codes and output:

> d=read.table('data.csv',header=T,sep=',')
> head(d)
Year HARVESTED PLANTED
1 2015 21700 23500
2 2014 23800 25800
3 2013 24500 26800
4 2012 25300 27800
5 2011 26800 28400
6 2010 28000 29200
> attach(d)
> fit=lm( HARVESTED~ PLANTED)
> fit

Call:
lm(formula = HARVESTED ~ PLANTED)

Coefficients:
(Intercept) PLANTED
-3594.368 1.063

Hence slope of the regression equation for the years 2010 to 2015 is 1.1