The violent crime rates (in number of violent crimes per 100,000 people) in the United States are shown in Table 44 for various years.
Table 44
U.S. Violent Crime rates
Violent Crime Rate
Year(crimes per 100,000 people)
1990 ………………………………730
1995 ………………………………685
2000 ………………………………507
2005 ………………………………469
2010 ………………………………405
2012 ………………………………387
a. Construct a time-series plot.
b. Has the violent crime rate increased, decreased, stayed approximately constant, or none of these?
c. Find the change in the violent crime rate from 2010 to 2012. What does it mean in this situation?
d. Find the change in the violent crime rate from 2000 to 2012. If the violent crime rate changes by the same amount from 2012 to 2024, what will it be in 2024? Do you have much faith that this will turn out to be true? Explain.