Linear Association with R Value

• Positive Association
• Negative Association
• No Association
• Non-Linear Association

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 correlation is positive if the y variable generally increases as the x variable increases.

• True

• False

Choose two words from those listed below to best describe the correlation between the two variables.

• strong

• weak

• positive

• negative

Choose two words from those listed below to best describe the correlation between the two variables.

• strong

• weak

• positive

• negative

Choose two words from those listed below to best describe the correlation between the two variables.

• strong

• weak

• positive

• negative

What type of correlation is shown in the scatter plot?

• Positive Linear Correlation

• Negative Linear Correlation

• Non-Linear Correlation

• No Correlation

Estimate the correlation coefficient for this scatterplot.

• r = 1.2

• r = 0.89

• r = 0

• r = -0.89

A correlation value (r) that has a strong, positive linear association would have a value close to

• 1

• 0

• -1

• Cannot be answered

Estimate the correlation coefficient for this scatterplot.

• r = -0.9

• r = 1

• r = 0.9

• r = -1