Correlation Coefficient and Trendline

Estimate the correlation coefficient

• r=-1

• r=1

• r=-0.5

• r=0.5

Estimate the correlation coefficient.

• r=1

• r=-1

• r=0.5

• r=-0.5

A perfect negative correlation has a correlation coefficient of ____. 

• 1

• -1

• 0

A perfect positive correlation has a correlation coefficient of ____. 

• 1

• -1

• 0

Which graph represents data that has a correlation coefficient close to -1?

• 
• 
• 
• 

What kind of correlation?

• Positive

• Negative

• No

What type of correlation does this scatter plot show?

• Positive correlation

• Negative correlation

• No correlation

• Constant correlation

Estimate the correlation coefficient.

• r=0

• r=-1

• r=1

• r=2

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

• -1<r<1

• -1>r>1

• -1≤r≤1

• -1≥r≤1

r=-0.89

• Strong positive 

• Weak positive 

• Strong negative 

• Weak negative