Linear Correlation and Regression

Determine the Correlation Coefficient and decide whether it is weak, moderate, or strong.

• -0.19 weak

• -0.19 moderate

• 0.04 weak

• 0.04 strong

Which value below could be the correlation of the scatterplot?

• -0.923

• -0.478

• 0.006

• 0.777

Is r = -0.87 strong, moderate, or weak?

• strong

• moderate

• weak

Which graph represents data that has a correlation coefficient close to -1?

• 
• 
• 
• 

Describe the relationship between the variables.

• Strong positive correlation

• Weak positive correlation

• Strong negative correlation

• Weak negative correlation

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 below shows the number of books read by students in Mrs. Hall’s English class and their final grades. Which statement represents the best description about the line of best fit?

• The more books students read, the lower their English grade.

• The more books students read, the higher their English grade.

• The fewer books students read, the higher their English grade.

• No relationship exists between the number of books students read and their English grades.

Which with is the line of best fit?

• Black

• Orange

• Red

• Blue

Make a prediction for a resting heart rate after 6 hours of exercise a week.

• 6

• 50

• 55

• 59

Describe the correlation in the graph shown.

• Strong Negative

• Strong Positive

• Weak Negative

• Weak Positive