Line of Best Fit, Regression, Correlation Coefficient

What type of correlation does this graph have?

• Negative

• No Correlation

• positive

Based on the graph, if Joe earned $400, how many hours did he work?

• 25 hours

• 35 hours

• 45 hours

• 15 hours

A connection between two or more things

• Correlation

• Linear

• Trend Line

• Scatter Plot

What is a line of best fit used for?

• To make predictions

• To make the graph look pretty

• To connect the points

Shown is a residual plot. Would a linear regression model of the data be most appropriate?

• YES

• NO

After performing analyses on a set of data, Mrs. Schoeneck examined the scatter plot of the residual values for each analysis. Which scatter plot indicated the best linear fit for the data?

• A

• B

• C

Shown is a residual plot. Would a linear regression model of the data be most appropriate?

• YES

• NO

What is the correlation?

• Negative correlation

• No correlation

• Positive correlation

What type of correlation does this scatter plot show?

• positive correlation

• negative correlation

• no correlaton

Estimate the correlation coefficient (or the r-value).

• r = 0.8

• r = -0.5

• r = 0.5