The graph represents the revenue R (in millions of dollars) for Chipotle Grill from 2007 through 2013, where t represents the year, with t = 7 corresponding to 2007. Revenue (in millions of dollars) 3500 3000 2500 2000 1500 R Chipotle Mexican Grill 1000 7 8 9 10 11 12 13 Year (72007) 1. Estimate the slope of the graph for the year 2008. Show all calculations and interpret the result in the context of the problem. (Assessing Communication and interpretation)