Lines of Best, Correlation Coefficients and Residuals

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

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

What type of correlation does this graph have?

• Negative

• No Correlation

• positive

A connection between two or more things

• Correlation

• Linear

• Trend Line

• Scatter Plot

Estimate the correlation coefficient for this scatterplot.

• r = -0.9

• r = 0.4

• r = 0.9

• r = -0.4

Which of the following lines represents the line of best fit for the scatter plot?

• A

• B

• C

• D

If the line of regression is y = 3.45x - 6.7 and the actual point is (5,12), what is the residual for that point?

• 1.45

• -1.45

• 34.7

• -34.7

The scatter plot shows the number coffee shops in different cities and the number of violent crimes. Which of the following is NOT true?

• A) As the number of coffee shops increase, violent crimes appears to increase.

• B) The line of best fit (regression line) shows a positive correlation

• C) The data has a positive correlation coefficient

• D) An increase in coffee shops causes an increase in violent crimes