Solve the problem.An approximation of the amount in billions of dollars that Americans have spent on their pets from 1998 to 2006 can be obtained by substituting a given year for x in the expression 1.712x - 3402. How has the amount Americans have spent on their pets changed from 1998 to 2006?
A. It has largely increased.
B. It has increased a little.
C. It does not really change.
D. It has decreased.
Answer: A
Mathematics
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B. 14
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