Determine whether the relation defines y as a function of x. Give the domain.y = 
A. Function; domain: (-?, ?)
B. Not a function; domain (-?, 11) ? (11, ?)
C. Not a function; domain: (-?, ?)
D. Function; domain (-?, -1) ? (-1, ?)
Answer: A
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Rationalize the denominator and simplify. 
A. 
B. 
C. 
D. 
Solve the problem.The groundhog population of Punxsutawny, Pennsylvania is closely monitored each year. Two years ago the population decreased by 12%. Last year the number of groundhogs increased by 6%. This year the population also increased by 9%. What was the percentage increase/decrease of groundhogs over these three years? Round your answer to the nearest tenth of a percentage point.
A. 29.4% increase B. 1.7% increase C. 4.3% decrease D. 9.2% increase E. 24.8% decrease
Divide.
A. 15x4 + 21x2 + 27 B. 5x4 - 7x2 - 9 C. 5x8 + 7x6 + 9x4 D. 5x4 + 7x2 + 9
Graph the polar equation.r = 5 cos 5?
A. 
B. 
C. 
D. 