Analyzing Residuals

Question 1

Shanti wrote the predicted values for a data set using the line of best fit y = 2.55x – 3.15. She computed two of the residual values.

Revolt · Accepted Answer

a = –0.4 and b = 0.15

Question 2

Consider the table showing the given, predicted and residual values for a data set.

Revolt · Accepted Answer

(4, 0.1)

Question 3

Miguel wrote the predicted and residual values for a data set using the line of best fit y = 1.82x – 4.3. He left out two of the values.

Revolt · Accepted Answer

a = 1.16 and b = 0.12

Question 4

Consider the table showing the given, predicted, and residual values for a data set.

Revolt · Accepted Answer

(4, -0.6)

Question 5

Which residual plot shows that the line of best fit is a good model?

Revolt · Accepted Answer

A graph shows both axes unnumbered. Points are scattered all over the graph.

Question 6

Consider the graph of the line of best fit, y = 0.5x + 1, and the given data points.

Revolt · Accepted Answer

–1

Question 7

What does a residual value of –0.8 mean in reference to the line of best fit?

Revolt · Accepted Answer

The given point is 0.8 units below the line of best fit.

Question 8

The approximate line of best fit for the given data points, y = −2x − 2, is shown on the graph.

Revolt · Accepted Answer

–2

Question 9

Use the table to find the residual points. Which residual plot is the correct one for the data?

Revolt · Accepted Answer

Answer image: https://media.edgenuity.com/evresources/3109/3109-11/3109-11-03/3109-11-03-assessment/3109-11-03-14b.PNG

Question 10

Find the residual values, and use the graphing calculator tool to make a residual plot.

Revolt · Accepted Answer

Yes, because the points have no clear pattern.

Analyzing Residuals Answers