Scatter Plots Correlation Coefficient

The measure of the strength and direction of a linear relationship

• Interpolation

• Extrapolation

• Correlations Coefficient

• Residual

Based on the graph, if Joe earned $400, how many hours did he work?

• 25 hours

• 35 hours

• 45 hours

• 15 hours

As x increases, y decreases

• Postive Correlation

• Negative Correlation

• No Correleation

• Trend Line

A line drawn in a scatter plot to fit most of the dots and

shows the relationship between the two sets of data

• Association

• Causation

• Line of Best Fit

• Linear Regression

Estimate the correlation coefficient for this scatterplot.

• r = 1.2

• r = 0.89

• r = 0

• r = -0.89

Determine the correlation coefficient of the given data:

• .9820

• -.9643

• -1.409

• .164

Describe the correlation in the graph shown.

• Strong Negative

• Strong Positive

• Weak Negative

• Weak Positive

What type of association does this graph have?

• positive

• negative

• none

• all of the above

r=-0.89

• Strong positive 

• Weak positive 

• Strong negative 

• Weak negative 

Determine the Correlation Coefficient and decide whether it is weak, moderate, or strong.

• 0.07 weak

• -0.26 weak

• -0.26 moderate

• 0.07 strong