Exhibit 2-1 -Exhibit 2-1 Shows Movements of Two Variables,X and Y,from 1980

Multiple Choice

Exhibit 2-1
-Exhibit 2-1 shows movements of two variables,X and Y,from 1980 through 1991.From this diagram the most one can conclude is that

A) X and Y are positively correlated with each other.
B) X and Y are negatively correlated with each other.
C) X and Y are positively correlated with each other and either X causes Y or Y causes X.
D) we cannot say anything about how X and Y are related because we do not know the units of measurement for X and Y.
E) X and Y are not correlated with each other.