Line of Best Fit and Residuals

Which line is the best line of best fit?

• a

• b

• c

• i don't see any lines

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

• YES

• NO

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 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 the linear regression model for this data set. What is the residual for the point (31, 560)? (round to nearest hundredth)

• 2.48

• -15.79

• -7.52

• 12.87

Use Desmos to generate the linear regression model for this data set. Use the model to predict the number of calories for an item with 45 grams of fat. Round to the nearest whole number.

• 663

• 722

• 807

• 792

Use Desmos to determine the linear regression model for this data set. What is the equation for the best fit line?

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

In a statistics course, a linear regression equation was computed to predict the final exam score based on the score on the first test of the term. The equation was y=25+0.7x where y is the final exam score and x is the score on the first test. George scored 80 on the first test. On the final exam George scored 85. What is the value of his residual?

• -4

• 4

• 4.5

• 5

• 81