CH 10 HW Working with Data: Evolving Herbicide Resistance 1 of 20 Review |Constants|Periodic Table Introduction In 1996, farmers began planting seeds that were genetically modified to resist herbicides. As the graph shows, the amount of herbicide used initially decreased after that, but then increased to a level higher than the original amount. Use this graph to answer the questions. A line graph showing herbicide use in pounds per acre on the y-axis for the years 1996, 2001 and 2006. In 1996, approximately 1.2 pounds of herbicide per acre were used, in 2001, approximately 0.9 pounds per acre, and in 2006, approximately 1.4 pounds per acre. Part A - Interpreting the graph Part complete By roughly what percentage did herbicide use change over the 10-year period of time shown in the graph? Herbicide use increased by about 8%. Herbicide use decreased by about 8%. Herbicide use increased by about 17%. Herbicide use decreased by about 17%. Previous Answers Correct In 1996, around 1.2 pounds of herbicide per acre was used. In 2006, around 1.4 pounds per acre was used, so there was an increase of 0.2 pounds per acre over the 10-year period. Dividing 0.2 by the original amount (1.2)