Population in the city of chicago increased by a lot. this will the demand for most goods and services, at each price level.
increase
decrease
stay the same

Increase! (: This is because the more people there is, the more people that could possibly be hungry or have the chance in injuries so they would need a higher demand in goods and services. "Goods" may be used as another word for material or utilies, while " services" may represent government or non-government associations such as hospitals or taxes.