A farmer decides to get rid of the Japanese beetles that were eating his peach
trees. The farmer sprayed the most expensive spray and the results are shown
below.
Model Al
Model B
B.
Number of Aphids
40
2006
A.
2007
Number of Aphids
no
Before treatment
After treatment
2008
2009
2006
Before treatment
After treatment
2007
2008
2010
2011
Year
2009
2010
2011
2012
Year
2013
2012
2013
2014
2014
2015
2015
Examine the models and determine which model demonstrates the
beetles' resistance to the pesticides over the 7 years. Justify your
answer!