menu
Qammunity.org
Login
Register
My account
Edit my Profile
Private messages
My favorites
Given the data set (4, 85), (7, 92), (14, 110), which of the following equations best represents a line of best fit? y = seven over threex + 75.67 y = two over threex + 75.67 y …
Ask a Question
Questions
Unanswered
Tags
Ask a Question
Given the data set (4, 85), (7, 92), (14, 110), which of the following equations best represents a line of best fit? y = seven over threex + 75.67 y = two over threex + 75.67 y …
asked
Jun 1, 2018
63.9k
views
1
vote
Given the data set (4, 85), (7, 92), (14, 110), which of the following equations best represents a line of best fit?
y = seven over threex + 75.67
y = two over threex + 75.67
y = five over threex − 75.5
y = seven over fourx − 75.5
Mathematics
high-school
Mjaskowski
asked
by
Mjaskowski
7.9k
points
answer
comment
share this
share
0 Comments
Please
log in
or
register
to add a comment.
Please
log in
or
register
to answer this question.
2
Answers
2
votes
answer A should be the correct answer
Glen Despaux Jr
answered
Jun 2, 2018
by
Glen Despaux Jr
8.5k
points
ask related question
comment
share this
0 Comments
Please
log in
or
register
to add a comment.
1
vote
Let's see if there is a constant rate first...
(92-85)/(7-4)=7/3
(110-92)/(14-7)=18/7 so there is no constant rate...so the line of best fit (linear least squares regression line) will have a slope of:
m=(nΣxy-ΣxΣy)/(nΣx^2-ΣxΣx)
m=(3*2524-25*287)/(3*261-625)
m=397/158
b=(Σy-mΣx)/n
b=(158Σy-397Σx)/(3*158)
b=(45346-9925)/(3*158)
b=11807/158
So the line of best fit is:
y=(397x+11807)/158
so approximating this line....
y≈2.5x+74.73
So the closest that you have is:
y=7x/3+75.67
Steve Harris
answered
Jun 6, 2018
by
Steve Harris
7.6k
points
ask related question
comment
share this
0 Comments
Please
log in
or
register
to add a comment.
← Prev Question
Next Question →
Related questions
asked
Sep 2, 2020
51.7k
views
Write an expression that is equivalent to two over three(4x + 9). eight over threex + 6 eight over threex + 9 two over threex + 6 two over threex + 9
Ayush Gupta
asked
Sep 2, 2020
by
Ayush Gupta
8.5k
points
Mathematics
high-school
2
answers
5
votes
51.7k
views
asked
Dec 11, 2020
24.8k
views
Write an expression that is equivalent to two over three (4x + 9). eight over threex + 6 eight over threex + 9 two over threex + 6 two over threex + 9
Rohan Sanap
asked
Dec 11, 2020
by
Rohan Sanap
8.6k
points
Mathematics
middle-school
1
answer
1
vote
24.8k
views
asked
Mar 5, 2021
184k
views
Threex=six over five
Ahmad Badpey
asked
Mar 5, 2021
by
Ahmad Badpey
7.5k
points
Mathematics
middle-school
2
answers
1
vote
184k
views
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.
9.4m
questions
12.2m
answers
Categories
All categories
Mathematics
(3.7m)
History
(955k)
English
(903k)
Biology
(716k)
Chemistry
(440k)
Physics
(405k)
Social Studies
(564k)
Advanced Placement
(27.5k)
SAT
(19.1k)
Geography
(146k)
Health
(283k)
Arts
(107k)
Business
(468k)
Computers & Tech
(195k)
French
(33.9k)
German
(4.9k)
Spanish
(174k)
Medicine
(125k)
Law
(53.4k)
Engineering
(74.2k)
Other Questions
How do you can you solve this problem 37 + y = 87; y =
What is .725 as a fraction
How do you estimate of 4 5/8 X 1/3
Twitter
WhatsApp
Facebook
Reddit
LinkedIn
Email
Link Copied!
Copy
Search Qammunity.org