Examine Figure 1 below in the article "Kemal S, Sheehan K, Feinglass J.Gun carrying among freshmen and sophomores in Chicago, New York City and Los Angeles public schools: the Youth Risk Behavior Survey, 2007-2013. Inj Epidemiol. 2018 Apr 10;5(Suppl 1):12." Which measure of occurrence is used to describe gun carrying behavior? What is one question you might ask about the pattern in Figure 1?

Pervert Reported Gon Carrying Cy Chicago Four Year Fig. 1 Tiends in self-reported gun carrying among freshman and sophomores in Chicago, New York City and Los Angeles from 2007 to 2013 using YRBS weighted drta The figure depicts the bend andysk of self-reponed gun carying in Chicago, New York City and Los Angeles Chicago maintained a higher prevalence than both Los Angeles and New York City following 3007, Los Angeles shows a steady dedire over the 4 years while New You Cty maintains a steady late over the 4 years. There was not a statistically significant diference within any of the three cities over this time period