Regression and Residuals

Estimate the correlation coefficient.

• r = -0.8

• r = -0.5

• r = 0.5

• r = 0.8

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

Use Desmos to generate the linear regression model for this data set. What is the correlation coefficient, r?

• 0.9499

• 11.7313

• 193.852

• 0.9746

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

Shown is a residual plot. How many negative residuals are there?

• 5

• 1

• 3

• 9

What is the slope of this prediction equation?

• 1344

• 19

• -19

• -19x

LSRL stands for

• Least Sum Regression Line

• Least Squares Regression Line

• Lower Standard Regression Line

• Line Scatterplot Regression Line

Estimate the correlation coefficient for this scatterplot.

• r = 1.2

• r = 0.89

• r = 0

• r = -0.89