Linear Regressions and Scatterplots

A perfect positive correlation has a correlation coefficient of ____. 

• 1

• -1

• 0

A perfect negative correlation has a correlation coefficient of ____. 

• 1

• -1

• 0

If there is NO correlation between 2 variables, the correlation coefficient is ____. 

• 1

• -1

• 0

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 annual profits for a company are given in the following table, where x represents the number of years since 1992, and y represents the profit in thousands of dollars. Write the linear regression equation that represents this set of data, rounding all coefficients to the nearest hundredth. Using this equation, estimate the year in which the profits would reach 378 thousand dollars.

• 2029

• 2014

• 2003

• 8753

What type of correlation does the graph show?

• Positive Correlation

• Negative Correlation

• No Correlation

What type of correlation does the graph show?

• Positive Correlation

• Negative Correlation

• No Correlation

What type of correlation does the graph show?

• Positive Correlation

• Negative Correlation

• No Correlation

Which graph depicts the strongest positive correlation?

• 
• 
• 
• 

The linear regression equation is y = 61.93x - 1.79.  Use the equation to predict how far this person will travel after 10 hours of driving.

• 10 miles

• 617.5 miles

• 0.19 miles

• 500 miles