Scatterplot Slope, Y Intercept and Correlation

The association seen here is:

• Strong, positive

• Strong, negative

• Weak, positive

• Weak, negative

The best estimate of the correlation coefficient (r) is:

• 0.95

• 0.32

• -0.94

• -0.08

Identify the correct statement.

• Sales is the explanatory variable

• Temperature is the response variable

• As the temperature increases, the number of sales decreases

• The correlation coefficient is positive

If the value of r (correlation coefficient is 0.35) the association between two variables is:

• Strong and positive

• Weak and positive

• Weak and negative

• Strong and negative

The best estimate of r is:

• -0.98

• 0.44

• 0.87

• -0.61

The association between two numerical variables (such as age and height) is best displayed using a:

• Scatterplot

• Bar Chart

• Box Plot

• Dot Plot

Which value of r represents data with a strong negative linear correlation between two variables?

• -0.86

• -0.50

• 0.89

• 0.07

Which correlation coefficient shows the strongest linear relationship between x and y?

• 0.97

• -0.02

• 0.86

• -0.99

Describe the association between the number of lanes rented and the number of people bowling.

• Non-linear association
• Negative linear association
• No association
• Positive linear association

Which conclusion is best supported by the scatterplot?

• As the length of a call increases, the cost of the call increases.
• As the length of a call increases, the cost of the call remains the same.
• As the length of a call increases, the cost of the call decreases.
• There is no relationship between the length of a call and the cost of the call.