The ACCRA Cost of Living Index provides a useful and reasonably accurate measure of cost of living differences among 321 urban areas. Items on which the index is based have been carefully chosen to reflect the different categories of consumer expenditures. The data are in the file P2_19.XLS. Generate scatterplots to explore the relationship between the composite index and each of the various expenditure components.

a. Which expenditure component has the strongest relationship with the composite index?

b. Which expenditure component has the weakest relationship with the composite index?