The sactterplot and the model in Fig. 57 describe the association between years and the total Wealth (in billions of dollars) of the world€™s 80 richest people.

a. Is the association positive, negative, or neither? What does that mean in this situation?
b. Estimate the rate of change of the total wealth of the world€™s 80 richest people.

Transcribed Image Text:

Years versus Wealth of World's 80 Richest People 1.8 1.6 6 14 1.2 0.8 0.6 2002 2004 2006 2008 2010 2012 2014 Year