Focus Problem: Changing Population and Crime Rate Let x be a random variable representing percentage change in neighborhood population in the past few years, and let y be a random variable representing crime rate

(crimes per 1000 population). A random sample of six Denver neighborhoods gave the following information (Source: Neighborhood Facts, The Piton Foundation).

x 29 2 11 17 7 6 y 173 35 132 127 69 53 Complete parts

(a) through (c), given x 5 72; y 5 589; x2 5 1340; y2 5 72,277; xy 5 9499

(d) For a neighborhood with x 5 12% change in population in the past few years, predict the change in the crime rate (per 1000 residents).