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.As Thomas's income rose over the last 20 years so has his stress level.
A. Positive correlation; coincidence
B. Positive correlation; direct cause
C. Positive correlation; common underlying cause
D. Negative correlation; common underlying cause
Answer: C
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ds , C is the straight-line segment x = 0, y = 5 - t, z = t from (0, 5, 0) to 
A. 25
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C. 25
D. 
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Solve the problem.The logistic growth model 
represents the population of a species introduced into a new territory after t years. What will the population be in 30 years?
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