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LC: Scatter Plots and Trend Lines
By Erica Melle
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Last updated about 2 years ago
10 questions
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Question 1
1.
Jeremiah conducts a survey and finds that as the first variable in his survey decreases, the second variable increases.
What type of association is there between the two variables?
No Association
Negative Association
There is not enough information given
Positive Association
Question 2
2.
Which is a true statement about the scatter plot shown?
The association is linear.
The association is positive.
The graph does not appear to have any outliers.
All of the above are true
The table below shows the number of chapters and the approximate number of pages in
several books.
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Question 3
3.
Use the data in the table to construct a scatter plot.
visibility
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Question 5
5.
Which could likely be the variables represented in the scatter plot shown?
The number of buildings in a city and the number of trees in the city.
The population of a city and the number of letters in the city’s name.
The number of cars in a city and the pollution level of the city.
The population of a city and the number of houses in the city.
Question 6
6.
Which is a reasonable prediction based on the scatter plot below?
If x = 3, y = 52.
If x = 4, y = 95.
If x = 9, y = 20.
All of the above.
visibility
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Question 7
7.
Which is the most reasonable value of x when y = 150?
11
9
21
15
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Question 8
8.
Write an equation for the trend line in slope-intercept form.
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A city manager made a scatter plot of the number of retail stores in the city over the years. The scatter plot had a trend line with an equation:
y = 11x + 12
Where y is the total number of retail stores and x is the number of years since 1990.
Use this information to answer the two questions to the right.
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Question 9
9.
Mark and his family moved to the city in 1997. Use the equation to predict the number of retail stores in the city in 1997.
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Question 10
10.
When Darryl and his family moved to the city, there were 133 retail stores. Use the equation to predict what year Darryl’s family moved to the city.
Question 4
4.
Which is a true statement about the scatter plot you constructed?
As the chapters in a book increase, the total number of pages decreases.
As the chapters in a book decrease, the total number of pages decreases.
As the chapters in a book increase, the total number of pages increases.
As the chapters in a book increase, the total number of pages stay the same.