Analyzing Residuals

Question 1

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

Revolt · Accepted Answer

No, the points are in a curved pattern.

Question 2

Use the graphing calculator tool to plot the residual points.(1, 0.86), (2, –0.25), (3, –1.66), (4, –2.34), (5, –4.1)

Revolt · Accepted Answer

No, the points are in a linear pattern.

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

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.

Question 5

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 6

Consider the plot created from the residuals of a line of best fit for a set of data.

Revolt · Accepted Answer

No, the points are in a linear pattern.

Question 7

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

Revolt · Accepted Answer

–1

Question 8

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 9

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

Revolt · Accepted Answer

(4, -0.6)

Question 10

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

Revolt · Accepted Answer

(4, 0.1)

Analyzing Residuals Answers