Regression Lines of Fit

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

A difference between an actual y-value and a predicted

y-value

• Interpolation

• Extrapolation

• Correlations Coefficient

• Residual

Make predictions based on values outside the data points

• Interpolation

• Extrapolation

• Correlations Coefficient

• Residual

TRUE OR FALSE: Data points that lie above the trend line should be about the same distance as data points below the trend line.

• True

• False

TRUE OR FALSE: A line of best fit must go through the origin.

• True

• False

The residual plots from five different least squares regression lines are shown below. Which of the plots shows the strongest evidence that its regression line is an appropriate model for the data and is consistent with the assumptions required for inference for regression?

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What is a line of best fit used for?

• To make predictions

• To make the graph look pretty

• To connect the points

• To make it look like you know what you are doing

• 617.51 miles

• 621.09 miles

• 100 miles

• 0.19 miles

Line on a scatterplot that fits most points.

• Line of Best Fit

• Positive Correlation

• Parallel Lines

• Horizontal

  Line