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Key Concepts Quiz 2.4
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1
Lars measured the time required for his airplane to climb to various altitudes. Describe the trend evident from the graph.

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A)The airplane requires about the same time for each additional kilometres of altitude.
B)The airplane requires the same time for every km up to about 7 km, but then requires increasing time for each additional kilometres of altitude.
C)The airplane requires the same time for every kilometres up to about 3 km, and then requires increasing time for each additional kilometres of altitude.
D)The airplane requires increasing amounts of time for each additional kilometres of altitude.
2
Estimate the time required for the airplane to climb from 1 km to 1.5 km.
A)1.5 min
B)3 min
C)4 min
D)5 min
3
Estimate the time required for the airplane to climb to an altitude of 11 km.
A)34 min
B)36 min
C)40 min
D)50 min
4
Eduardo knows that his school has a tradition of putting on a musical production every year going back 50 years. He collected data on attendance at these productions, grouped into 5-year intervals. An appropriate way to display these data is
A)A scatter plot using a graphing calculator.
B)A scatter plot using computer software.
C)A bar graph using a graphing calculator.
D)All of these are appropriate.
5
Eduardo noted that attendance at this year's production was 250 people on Wednesday night and 200 people on Thursday night.
A)Eduardo is safe in predicting that the Friday night show will bring in exactly 150 people.
B)Eduardo is safe in predicting that the Friday night show will bring in between 135 and 165 people.
C)Eduardo is safe in predicting that the Friday night show will bring in between 110 and 190 people.
D)Eduardo should not extrapolate. He does not have enough data. In addition, people are more likely to go out on weekend evenings.





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