Consider a set of paired bivariate data.
a. Explain why ∑(x = x) = 0 and ∑(y = y) = 0
b. Describe the effect that lines x = and y = have on the graph of these points.
c. Describe the relationship of the ordered pairs that will cause g[(x = ) • (y = ) to be (1) positive, (2) negative, and (3) near zero.