Correlation Coefficient Practice

Which value of r tells you that the relationship of the data set is a weak, negative correlation?

• A. r = -0.95

• B. r = -0.25

• C. r = 0

• D. r = 0.25

Which value of r tells you that the relationship of the data set is a strong, positive correlation?

• A. r = -0.95

• B. r = 0

• C. r = 0.25

• D. r = 0.95

Which equation is the best model for the table values shown?

• y = -1.25x - 70.2

• y = -1.25x + 70.2

• y = 70.2x - 1.25

• y = 70.2x + 1.25

Using a graphing calculator, which equation is the best model for the table values shown?

The result of regression analysis on a graphing calculator is shown. Which statement can be made from the result?

• A. The association of the bivariate data is exponential.

• B. The correlation is positive.

• C. The correlation is negative.

• D. There is causation between the independent and dependent variables.