Stats - Correlation Coefficient and Line of Best Fit

What would be the equation for the line of best fit?

• y=3/4x+9

• y=-1/2x+9

• y=-3/4x-9

• y=-3/4x+9

Estimate the correlation coefficient for this scatterplot.

• A) r = 1.2

• B) r = 0.89

• C)r = 0

• D) r = -0.89

Describe the relationship between the variables.

• A) Weak negative correlation

• B) Moderate negative correlation

• C) Moderate positive correlation

• D) Strong negative correlation

Which colored line is the line of best fit?

• A) Black

• B) Orange

• C) Red

• D) Blue

What type of correlation does this graph show?

• A) Positive

• B) negative

• C) none

• D) all of the above

Which sentence describes the relationship shown on this scatter plot?

• As the temperature decreases, the visitors increase. 
• As the temperature increases, the number of visitors increases. 
• As the visitors increase, the temperature decreases. 
• No correlation

What does the value, r= -0.89, tell us about the linear relationship of two quantitative variables?

• Strong positive

• Weak positive

• Strong negative

• Weak negative

Determine the correlation coefficient of the given data:

• .9820

• -.9643

• 1.409

• .6864

Which equation best represents the data in the table?

• y = -13x + 143
• y = 13x + 143
• y = 143x + 13
• y = .996x + .998

What is the correlation coefficient for the data?

• 1
• -1
• .9967
• .9984