A statement is made about correlation. State whether the correlation is positive or negative and whether the correlation is most likely due to coincidence, a common underlying cause, or a direct cause.People who take more vacations score higher on standardized tests.
A. Positive correlation; coincidence
B. Positive correlation; direct cause
C. Negative correlation; common underlying cause
D. Positive correlation; common underlying cause
Answer: D
Mathematics
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Give an appropriate answer.Given the function f(x, y) and the positive number ? as in the formal definition of a limit, find a positive number ? as in the definition that insures 
< ?.f(x,y) = x + y ; ? = 0.02
What will be an ideal response?
Mathematics
Rationalize the denominator.
A. 
B. 
C. 
D. 
Mathematics
Solve.(x + 5)2/5 = 16
A. x = -1019, x = 1029 B. x = -9, x = 9 C. x = -1029, x = 1019 D. x = -1024, x = 1024
Mathematics
Solve the problem.Kannanaski Rapids drops 69 ft vertically over a horizontal distance of 883 ft. What is the slope of the rapids?
A. -0.001 B. -0.078 C. -12.8 D. -69
Mathematics