AnswersEAP-Algebra Functions and Data Analysis A CRLinear Regression Methods

Linear Regression Methods — Test Answers

0 verified answers3 views
21
Free Preview

The table shows the size of outdoor decks (x) in square feet, and the estimated dollar cost to construct them (y).xyx2xy10060010,00060,000144850 20,736122,4002251,300 50,625292,5003241,900 104,976615,6004002,300 160,000920,000∑x=1,193​∑y=6,950∑x2=346,337∑xy=2,010,500Which regression equation correctly models the data?

A
y = 5.83x – 1.04
B
y = 5.83x + 17
C
y = 5.71x + 29
D
y = 5.71x + 27.6
22
Free Preview

A line of best fit is f(x) ≈ −0.86x + 13.5 for the set of points in the table.

Question illustration
A
−5
B
−2
C
3
D
12
23

Review the scatterplot shown.

Question illustration
A
(2, 53), (5, 70), and (7, 80)
B
(7, 80), (8, 85), and (9, 90)
C
(1, 47), (2, 53), and (3, 61)
D
(2, 60), (5, 80), and (8, 90)
24

The graph shows the relationship between the number of ounces of cereal in a box and the price of the cereal.

Question illustration
A
none
B
positive
C
negative
D
constant
25

Rob is investigating the effects of font size on the number of words that fit on a page. He changes the font size on an essay and records the number of words on one page of the essay. The table shows his data.Which equation represents the approximate line of best fit for data, where x represents font size and y represents the number of words on one page?

Question illustration
A
y = –55x + 407
B
y = –41x + 814
C
y = –38x + 922
D
y = –26x + 723

Did you find these answers helpful?

More from this Course

Quiz
10 verified answers

Linear Regression Methods

Quiz
4 verified answers

Test

Quiz
2 verified answers

Unit Test