=+Its Effect on Biodegradation” (J. Hazard. Toxic Radioact. Waste, 2012: 75–78), researchers examined how wheat straw could be used to extract crude oil from a water surface. An experiment was conducted in which crude oil (0 to 16.9 g)

was added to 100 mL of saltwater in separate Petri dishes. Wheat straw (2 g) was then added to each dish and all dishes were shaken at 70 rpm overnight. The following data read from a graph is based on the amount of oil added (in g) and the corresponding amount of oil recovered (in g)

from wheat straw.

Oil Added Oil Recovered 1.0 0.610 1.5 0.840 2.1 1.512 2.8 1.792 3.6 2.952 4.5 2.880 5.5 4.400 6.6 5.346 7.8 6.396 9.1 7.189 10.5 8.085 12.0 9.840 13.6 11.696 15.2 13.224 16.9 14.365