Lines of Regression

When the data closely resembles a line

• 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

A difference between an actual y-value and a predicted

y-value

• Interpolation

• Extrapolation

• Correlations Coefficient

• Residual

Which equation written in slope-intercept form represents the trend line shown on the scatter plot below?

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

• A

• B

• C

• D

The red line represents the line of best fit for the scatter plot. How many ice cream sales are expected if the temperature is 90°?

• 55

• 0

• 103

• 100

The scatter plot shows the relationship between the number of chapters and the total number of pages for several books.  Use the trend line to predict how many chapters would be in a book with 180 pages. 

• 12 chapters

• 15 chapters

• 18 chapters

• 21 chapters

Looking at the graph showing a line of best fit, what is the correlation shown?

• Length of life is constant

• Length of life increases as amount of sunlight increases

• Length of life increases as amount of sunlight decreases

• Length of life decreases as amount of sunlight increases

A researcher gathered data to predict the number of new types of plants (y) that will be in a state park after x years. After making a scatter plot of the data, she determined the equation of a line of best fit to be y=0.25x+8 . Based on the equation, what is the number of new types of plants that will be in the park after 24 years?

• 8

• 14

• 32

• 64