Calculating the Correlation Coefficient

What is the line of best fit for the data?

• y = .25x + 8.25
• y = 8.25x + .25
• y = x + 1

What is the correlation coefficient for the table?

• 1
• -1
• .25
• 8.25

If the correlation coefficient of a table of data is 0.85, what is true about the line of best fit?

• There is a weak, positive relationship
• There is a strong, positive relationship
• There is a weak, negative relationship
• There is a strong, negative relationship

Estimate the correlation coefficient

• r=-1
• r=.9
• r=-0.5
• r=0.5

Estimate the correlation coefficient.

• r=0
• r=-1
• r=1
• r=2

r=-0.89

• Strong positive 
• Weak positive 
• Strong negative 
• Weak negative 

r=0.3

• Strong positive 
• Weak positive
• Strong negative
• Weak negative 

The correlation coefficient is a number "r" such that: 

• -1<r<1
• -1>r>1
• -1≤r≤1
• -1≥r≤1

Estimate the correlation coefficient for this scatterplot.

• r = 1.2
• r = 0.89
• r = 0
• r = -0.89

Estimate the correlation coefficient for this scatterplot. 

• r = -0.9
• r = 1
• r = 0.9
• r = -1