![Nonstationarity illustration Nonstationarity illustration](GUID-35AE0DC2-C411-4DE4-9195-DD680D23CE93-web.png)
Notice that the relationship between the number of 911 calls and the number of people is different in high-population tracts and southwestern low-population tracts.
Notice that the relationship between the number of 911 calls and the number of people is different in high-population tracts and southwestern low-population tracts.