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In how many years shown was the average duration of visits to Aquarium A more than twice as much as the average in 1985?
1) In 1985 the average visits is 45, so more than double this is at least 90. Only 1995 and 2000 years are above this threshold. C is the answer, thanks to the 3rd graph
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In 1980, if a full-price ticket cost $4.70, what would have been the average daily revenue, in thousands of dollars, from the sale of full-price tickets?
2) From the 1st graph 50 is the average in 1980. 50 * 4.7 = 235
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In 2000, the total number of dollars of gift shop revenue was how many times as great as the average daily number of full-price tickets sold?
3) You do need the second and the first graph to answer this question. In 2000 the gift was 3.6 and the average was 90. of course, 3.6 is millions of $. \(\frac{3.6}{90} = 40\)
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What was the approximate percent increase in average daily full-price ticket sales from 1990 to 1995?
4) % increase between 1995 and 1990 is pretty straight : \(\frac{325-220}{220} = 47.7\) D is the answer 48%
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Which of the following statements can be inferred from the data?
5) A and C are false. Only B is true looking at all 3 graphs.
Hope this helps.
PS: the secret to tackle DI questions is to read super very carefully the stems and see very attentive the graphs. All the information are there.
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