T SECTION 2.2 7. Traffic fatalities 2013 Here are two histograms showing the annual number of traffic fatalities in passenger cars. (NHTSA) One plots the years, and the other plots the fatalities. 1975 1980 1985 1990 1995 2000 2005 2010 2015 Year 15 10- 5- 10,000 17,500 25,000 Passenger Car Fatalities a) There are gaps in the histogram for Year. What do they indicate? b) Why are all the bars in the Year histogram the same height? c) Explain what the histogram says about passenger car fatalities.