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The Rumor Spread Slowly--Then Faster--Then Slowly Again

Question 88

Multiple Choice

The rumor spread slowly--then faster--then slowly again. Which of the following statements describes the graph of number of people who have heard the rumor against time?


A) Increasing and concave up
B) Decreasing and concave up
C) Increasing and concave down
D) Decreasing and concave down
E) None of the above

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