Linear Correlation and Regression

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 increases

• correlation coefficient

• causation

• positive correlation

• negative correlation

As x increases, y decreases

• Postive Correlation

• Negative Correlation

• No Correleation

• Trend Line

The data slightly resembles a line but is more spread out

• Strong Correlation

• Weak Correlation

• No Correlation

• Correlation

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

A method used to find the line of best fit.

• Association

• Causation

• Line of Best Fit

• Linear Regression

The measure of the strength and direction of a linear relationship

• Interpolation

• Extrapolation

• Correlations Coefficient

• Residual

A difference between an actual y-value and a predicted

y-value

• Interpolation

• Extrapolation

• Correlations Coefficient

• Residual

Find the correlation coefficient (3 sig fgis)

Find the correlation coefficient (round to 3 significant digits)