Quiz: Scatter Plots and Trend Lines Predictions

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?

• Positive association

• Negative association

• No association

• There is not enough information to tell.

Tags

CCSS.HSS.ID.B.5

Which is a true statement about the scatter plot shown at the right?

• The association is linear.

• The association is positive.

• The graph does not appear to have any outliers.

• All the above are true.

Tags

CCSS.HSS.ID.B.5

3. The table below shows the number of chapters and the approximate number of pages in several books.

What type of association is between the data?

• Negative Association

• Positive Association

• No Association

Tags

CCSS.HSS.ID.B.5

Select true statement(s) about the scatter plot for the following data.

• 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 decrease, the total number of pages increases.

Which could likely be the variables represented in the scatter plot shown?

• The population of a city and the number of houses 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 number of buildings in a city and the number of trees in the city.

Tags

CCSS.8.SP.A.1

Which is a reasonable prediction based on the scatter plot ?

• If x = 3, y = 52.

• If x = 4, y = 95.

• If x = 9, y = 20.

• All of the above.

Which is the most reasonable value of x when y = 150?

• 15

• 21

• 9

• 11

Tags

CCSS.HSF.IF.A.2

8. Write an equation for the trend line in slope-intercept form.

• y = 25x + 200

• y = 30x + 150

• y = 25x - 200

• y = 50x + 200

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 of y = 11x + 12, where y is the total number of retail

stores and x is the number of years since 1990.

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.

• 50

• 89

• 70

• 98

Tags

CCSS.HSF.BF.A.2

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 of y = 11x + 12, where y is the total number of retail

stores and x is the number of years since 1990.

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.

• 1997

• 2001

• 1995

• 2006

Tags

CCSS.HSF.LE.B.5