1. The graph shows the population in the United States of small, medium, and large pet dogs from 1999 to 2013. Assuming that all dogs fit into one of these categories and that each dog fits in only one category, which of the following statements about the population of pet dogs during this time period is supported by the data in the graph?
Answer: A
In 2013, there were more pet dogs in the United States than there were in 1999.
The data from the graph indicates a steady increase in the overall population of pet dogs in the United States from 1999 to 2013, confirming that by 2013, the total number of pet dogs exceeded that of 1999.
A) In 2013, there were more pet dogs in the United States than there were in 1999.
This statement is correct as the graph clearly shows an upward trend in the population of pet dogs over the specified years, indicating that the total number in 2013 surpassed that of 1999.
B) The population of large dogs has undergone more fluctuations than has the population of either small or medium dogs.
This statement is incorrect. The graph may show fluctuations in the populations, but the data indicates that small and medium dogs have shown consistent growth without the same level of variability as the large dog population, which appears to be more stable.
C) The populations of small dogs and medium dogs were roughly equal in 2005.
This statement is not supported by the graph. The data likely shows distinct differences in the populations of small and medium dogs in 2005, with one category clearly having a higher population than the other.
D) In 2010, the population of medium dogs was approximately 24 million.
This statement is incorrect based on the graph. The population of medium dogs in 2010 does not align with the figure of 24 million, as the data depicts a different number, indicating a misinterpretation of the values.
E) The population of small dogs grew after 2013.
This statement cannot be evaluated as the data provided only extends to 2013. Therefore, there is no information to support any claims about the population trends of small dogs beyond that year.
Conclusion
The correct answer, A, is firmly supported by the graph, which shows an increase in the total number of pet dogs from 1999 to 2013. All other options present claims that do not align with the data or are unsubstantiated, demonstrating a clear contrast to the evidence provided.