A biologist believes that some types of algae have the potential to cause damage to river ecosystems. The accompanying data on algae colony density and rock surface area for nine rivers is recorded to determine whether rock surface area can be used to predict algae colony density. Suppose that the correlation coefficient of the relationship between algae colony density and rock surface area is 0.85. What percentage of the variation in algae colony density can be attributed to the rock surface area? O a. 79% O b. 94.3% O c. 92.2% O d. 72.3% O e. 79.2%