Regression Lines and Correlation

Shown is a residual plot. Would a linear regression model of the data be most appropriate?

• YES

• NO

In a scatterplot r is called

• Coefficient of Determination

• Correlation coefficient

• Regression Line

• Slope

• 617.51 miles

• 621.09 miles

• 100 miles

• 0.19 miles

Tags

CCSS.HSF.LE.B.5

• 50 miles

• -50 miles

• 8 miles

• -25 miles

Tags

CCSS.8.EE.C.8C

What type of association does this graph have?

• positive 

• negative

• none

• all of the above

Tags

CCSS.HSF-LE.A.1B

After performing analyses on a set of data, Mrs. Schoeneck examined the scatter plot of the residual values for each analysis. Which scatter plot indicated the best linear fit for the data?

• A

• B

• C

Use Desmos to generate the linear regression model for this data set. What is the equation?

Tags

CCSS.8.EE.C.8C

Use Desmos to generate a linear regression model. What is the value of the correlation coefficient, r?

• 0.8458

• 0.6918

• 3.19403

• 75.9403

Use Desmos to determine the linear regression model for this data set. What is the residual for the point (6, 368)? Round to the nearest hundredth.

• -2.21

• 6.31

• -2.91

• -0.73

Use Desmos to determine the linear regression model for this data set. Use the equation to predict how many words this student can type in 20 minutes.

• 1198 words

• 2500 words

• 1171 words

• 1162 words