Return to your building age map and open the properties for the "Year Built" layer. Click the symbology tab and click the classify window.
Clicking on each Break Value will tell you how many buildings were built in each time period.
1) List the time periods on your map and how many buildings were built in each.
2) Is there a trend in building ages in Bushwick? When were the greatest number of buildings built, when were the least?
3) What does this trend tell you about the pace of change in Bushwick? What is going on now in Bushwick now?
4) Look at all the new buildings in Bushwick. What do you think was there before it was built?
Bonus Question: Use the selection tool (select by attributes) to figure out how many buildings were built in 2006 and 2007.