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Lesson 6 Practice Problems
Problem Statement
Han creates a scatter plot that displays the relationship between the number of items sold, , and the total revenue, , in dollars. Han creates a line of best t and nds that the residual for the point is 75. The point has a residual of -40. Interpret the meaning of -40 in the context of the problem.
Solution
Sample response: The point best t.
Problem Statement
The line of best t for a data set is pairs, .
a. b. c. d. e. f.
Solution
a. -0.1 b. -0.2 c. 0.32
d. 0
e. -0.1
f. -2.76
Problem Statement
is 40 dollars below the total revenue estimated by the line of
. Find the residual for each of the coordinate
Unit 3
Lesson 6 Practice Problems 99
Plots of the residuals for four di erent models of the same data set are displayed. Which of the following represents the plot of the residuals from a model that ts its data best?
