In 1991, there were 64.6 burglaries per 1000 households in the United States. The number of burglaries reported annually declined at a roughly constant rate over the next decade, and in 2001 there were 28.7 burglaries per 1000 households. (Source: U.S. Department of Justice)

1. Sketch a line that goes through the two points $(t, B)$ given in the problem, where $t = 0$ in 1990.
   
   
   Choose the correct graph.
   (A)
   (B)
   (C)
   (D)
2. Find the slope of the line, including units.
   $m$ is ? burglaries per decade burglaries per 1000 households per year households per burglary per year burglaries per year
   What does the slope tell us about this problem?
   The burglary rate declined by 3.59 burglaries per decade
   The burglary rate declined by 3.59 burglaries per 1000 households every year
   The burglary rate declined by 3.59 burglaries per year
   (in the years 1991 to 2001).