Data and Scatterplots

Which scatter plot shows a linear relationship between x and y?

• Graph A

• Graph B

• Graph C

• Graph D

What type of association does this graph have?

• positive

• negative

• none

• all of the above

The scatter plot shows the relationship between the number of chapters and the total number of pages for several books.  Use the trend line to predict how many chapters would be in a book with 180 pages. 

• 12 chapters

• 15 chapters

• 18 chapters

• 21 chapters

The scatter plot shows the relationship between the number of chapters and the total number of pages for several books.  Use the trend line to predict how many chapters would be in a book with 140 pages. 

• 12 chapters

• 19 chapters

• 14 chapters

• 21 chapters

Describe the correlation in the graph shown.

• Strong Negative

• Strong Positive

• Weak Negative

• Weak Positive

The daily attendance at a bowling alley was recorded for 15 days. The scatterplot shows the number of lanes rented each day and the number of people who bowled that day. Which statement is best supported by the scatterplot?

• There is a non-linear association between the number of lanes rented and the number of people who bowl.

• There is a negative linear association between the number of lanes rented and the number of people who bowl.

• There is no apparent association between the number of lanes rented and the number of people who bowl.

• There is a positive linear association between the number of lanes rented and the number of people who bowl.

The scatterplot shows the number of people in each of 8 different households and the average amount of money each household spent on groceries. Which statement best describes the association between the number of people in a household and the average amount of money spent on groceries?

• As the number of people in the household increases, the average amount of money spent on groceries decreases.

• As the number of people in the household increases, the average amount of money spent on groceries increases.

• As the number of people in the household decreases, the average amount of money spent on groceries increases.

• There is no apparent association between the number of people in the household and the average amount of money spent on groceries.

Phil collected data from several of his friends about the number of hours they spent sleeping and the number of hours they spent playing video games on Saturday. He recorded the data in the scatterplot. Which statement best describes the association between the number of hours they spent sleeping and the number of hours they spent playing video games?

• As the number of hours of sleeping increases, the number of hours playing video games increases.

• As the number of hours of sleeping decreases, the number of hours playing video games decreases.

• As the number of hours of sleeping decreases, the number of hours playing video games increases.

• There is no apparent association between the number of hours of sleeping and the number of hour playing video games.

You are analyzing a scatter plot that has a negative correlation. What is true of the of the x and y values?

• As x increases, y decreases

• As x increases, y increases

• As x decreases, y decreases

About how many male math teachers were there in 2006?

• 15

• 30

• 35

• 45