Correlation and Predictions of Linear Functions

Which of the following best describes the correlation shown on the graph?

• negative correlation

• positive correlation

• no correlation

Which of the following best describes the correlation shown on the graph?

• negative correlation

• positive correlation

• no correlation

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

Which sentence describes the relationship shown on this scatterplot?

• As the temperature decreases, the visitors increase.

• As the temperature increases, the number of visitors increases.

• No correlation

What is a line of best fit used for?

• To make predictions

• To make the graph look pretty

• To connect the points

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

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

• YES

• NO

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