By using actual data from the National Interagency Fire Center, you will graph the number of acres burned by wildfire as well as the cost of fighting fires over the last 40+ years. You will then analyze your graphs to spot trends in fire over time. Materials: Graph paper ( PDF available in the Educator Guide tab below ) Pencil Data tables from the National Interagency Fire Center ( provided ) Topics: Fire, Cost Analysis, Graphing, Wildfire, Wildfire Cost.