Please help!!
Which two points would a line of fit go through to best fit the data?
(3, 6) and (7, 3)
(3, 7) and (9, 1)
(1, 9) and (5, 7)
(1, 7) and (2, 5)
Answers
Answer:
(a) (3, 6) and (7, 3)
Step-by-step explanation:
You want the two points that best describe a line of best fit through the data shown on the given graph.
Line of best fitA calculator finds the slope of the line of best fit to be about -0.74. The pair of points that best matches that is ...
(3, 6) and (7, 3) . . . . choice A
The line through these points has a slope of -0.75 and is very close to the best-fit line. The attachment shows how the various point pairs relate to the computed line. The answer choice points are the larger red dots.
__
Additional comment
The slope of the line of best fit is the ratio of the covariance of x and y to the variance of x:
m = cov(x, y)/var(x) = -7.744/10.455 ≈ -0.741
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Related Questions
A store is running a "buy 3 get 2 free" promotion on twelve-packs of soda. Each twelve-pack costs $5.49. How much will Peter pay for 25 twelve-packs of soda?
Answers
Answer: $82.35
Step-by-step explanation:
For every 3 you buy, you get 2 free. This means out of every 5 twelve-packs, you pay for 3 of them, or 60%.
3/5 = 0.6 or 60%
So, if you buy 25 of them, you pay for 60% of 25 twelve-packs, or 15 of them.
25 x 0.6 = 15
If you are paying for 15 twelve-packs, and each one is $5.49, then the total would be $82.35.
15 x 5.49 = 82.35
Answer:82.35
Step-by-step explanation:
For every 3 you buy, you get 2 free. This means out of every 5 twelve-packs, you pay for 3 of them, or 60%.
3/5 = 60%
if you buy 25 of them, you pay for 60% of 25 twelve-packs, or 15 of them.
25 x 0.6 = 15
15 twelve-packs, each one is $5.49, then the total would be $82.35.
15 x 5.49 = 82.35
Kyle has a storage box that is 2 ft. long, 3 ft. high, and has a volume of [tex]12ft^{3}[/tex]
Myla has a storage box that is 4 ft. high, 2 ft. long, and has a volume of [tex]16ft^{3}[/tex]
What are the widths of Kyle and Myla's boxes? Explain how you know.
help please! and please have easy explanation that's easy to understand :))
Answers
Answer:
OK so, volume= length x width x height
so, if the length of kyles box is 2, and his height is 3, but the volume is 12, then the width would be 2.
2 x 2 x 3=12
however, for myla, if her box is, 2 feet long and 4 feet high, but the volume is 16, then, her width is also 2.
2 x 2 x 4= 16
a way to look at this is, in the problem you are given the height and length, so, if its length times width times height, take your given length and multiply it by a number that will make it equal your given volume.
for example, let q=width, let m=height, and let j=length, p=volume, h=random variable.
j (x) h (x) m=p
its your job to find h.
hope this helps!
Step-by-step explanation:
HELP ASAP PLEASSEEEE
Answers
Answer:
-2
Step-by-step explanation:
Answer: -2
Step-by-step explanation: 5 x 2 = 10
5 x -2 = -10
-5 x 2 = -10
Basically reverse the process with division, if there is one negative the answer will be negative.
Triangle XYZ is drawn with vertices X(1, 2), Y(2, 5), Z(3, 4). Determine the translation direction and number of units if Z′(9, 4).
6 units down
6 units up
6 units to the right
6 units to the left
Answers
Answer:
(c) 6 units to the right
Step-by-step explanation:
You want to know the translation amount and direction that moves ∆XYZ to ∆X'Y'Z', where Z=(3, 4) and Z'=(9, 4).
TranslationThe translation vector can be found from the difference ...
Z' -Z = (9, 4) -(3, 4) = (6, 0)
The translation is 6 units right and 0 units up or down.
The direction and number of units is ...
6 units to the right, choice C.
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i've been stuck on this page for a while..
so i'm almost done this assignment but i cant figure out why this graph is misleading cause it looks accurate to me
help
Answers
Answer:
See below.
Step-by-step explanation:
a) $81235 - $15405 = $65830
b)
1) The graph uses cubes to represent the amount of sales.
2) I wonder if the amount of sales is proportional to the length of the side of the cube or to the volume of the cube.
c)
Using a ruler, the Year 1 cube has side length 5 units.
Using the same ruler, the Year 5 cube has side length 18 units.
The volume of the Year 5 cube is 5832 units³. The volume of the Year 1 cube is 125 units³.
The ratio of the volumes of Year 5 cube to the Year 1 cube is
5832/125 = 47:1
The ratio of sales of Year 5 to Year 1 is
81235/15405 = 5:1
The sales of Year 5 are approximately 5 times the sales of Year 1, tbut the cube of Year 5 has approximately 47 times the volume of the cube of Year 1. The graph is misleading because the volumes of the cubes are not proportional to the amounts of sales.
d) 47 times in volume
Three park rangers had to report on the ways visitors use their facilities. Each ranger surveyed a sample of park visitors. Determine whether or not each sampling described is random or biased.
Answers
Answer:
To determine whether a sampling is random or biased, we need to know how the sample was selected. Here are three possible scenarios:
Ranger 1 stands at the entrance to the park and surveys the first 100 visitors who arrive.
This sampling is biased, as it only includes visitors who arrived early in the day. Visitors who arrive later in the day may have different characteristics or behaviors, so this sample may not be representative of all park visitors.
Ranger 2 selects every 10th visitor who enters the park and surveys them.
This sampling is random, as every 10th visitor is selected without bias. This method is called systematic sampling.
Ranger 3 surveys visitors who are leaving the park on a rainy day.
This sampling is biased, as visitors who come to the park on a rainy day may have different motivations or behaviors than visitors on a sunny day. This sample may not be representative of all park visitors.
In summary, sampling methods that are random, such as systematic sampling, are preferred over biased sampling methods in order to obtain a representative sample of the population of interest.
Answer: Depending on the situation
Step-by-step explanation: For a sample to be random, everyone/thing has to have an equal chance of getting selected. Ex. One of the park rangers asked everyone in one part of the park. - This example would be biased because the people who weren't in that part of the park had less of a chance of being picked
HELP PLS 50 PTS
A 25-foot magazine rack begins 20 feet south of the checkout desk and continues south. What are the coordinates of the beginning and end of the magazine rack? Explain or show how you got your answer. ANSWER CORRECTLY WITH AN EXPLANATION
Answers
Answer:
I'll make this as fast as possible
(5,-20)
Step-by-step explanation:
Use the values below to work out the values that complete the formula. Give any decimals to 2.d.p.
Answers
Answer:
Step-by-step explanation:
65
can someone please help me i dont understand
Answers
Please answer it asap (it's due tomorrow), What is 0.99 ÷ 11? Show your work.
What is 5.12 ÷ 4? Show your work too. (Thanks if you helped :) )
Answers
Answer:
1. 0.9 is the answer
2. 1.28
Step-by-step explanation:
0.99÷11=99/100÷11/10=99/100x10/11=9/10=0.9
2.expand 5.12/4 by multiplying both numerator and the denominator by 100 512/400 reduce the fraction 512/400 to lowest terms by extracting and canceling out 10 32/25 for factor 2 5/5 2=1 7/25=1.28
Answer:
0.99÷11=0.09 5.12÷4=1.28
Adam is purchasing a new television that costs $2,187.96 after tax. He borrowed the money from his parents and must pay back the full amount plus simple interest at the rate of 3.5%. What is the total amount he will pay if he takes 2 years to pay his parents back? (Include Decimal with the cents; No Commas)
Answers
Basic Interest
When there is only one compounding every time period, simple interest is applied.
The formula for calculating interest after t years is 1 = Prt.
Where P is the initial sum and r is the interest rate in decimal form.
The following are the parameters for this problem:
P = 2187.96, r = 0.035, t = 2.
The interest will therefore be paid at the rate of 1=Prt = 2187.96 x 0.035 2 = $153.16.
The tape diagram represents an equation. Write an equation to represent the image.
Answers
Answer: 6t = 9
Step-by-step explanation:
What is visually explicable is that the 2 tape diagrams are equal.
One tape diagram equals 9, one is divided into 6 equal parts, each equals t.
6t's make up a diagram that is equal to a diagram equal to 9.
therefore 6t=9
The diameter of Circle A is 8 inches. The diameter of Circle B is 4 inches greater than the diameter of Circle A. The diameter of Circle C is 4 inches greater than the diameter of Circle B.
a. What is the area of each circle? Use 3.14 for π.
b. How many times greater is the area of Circle C than the area of Circle A?
Answers
Answer
circle a= 25.2
circle b= 37.68
it is 1/2 times greater
Step-by-step explanation:
I need this really quick
Answers
Answer:
4 3/8
Step-by-step explanation:
-2 1/2 * -1 3/4
-5/2 * -7/4
35/8
4 3/8
Hope this helps!
HELPPPPPP PLSSS DUE TMRW
Answers
Answer:
13
13
Step-by-step explanation:
-7+6= 7+6= 13
-7+6= 7+6= 13
a) work: you have to solve -7+6=-1.
it’s in those brackets so you have to change it to positive
b) -7 changed to positive 7. 7+6=13
what number can be subtracted from 11 get to 3
Answers
Answer:
8
Step-by-step explanation:
11 - 8 = 3
Was there anything more to this question?
A bit too simple for middle school level
need help on this mapping
Answers
Answer:
The answer is C
Step-by-step explanation:
The way my teacher helped us remember it last year was if Y repeats she is a cheater and breaks the function.
Suppose instead that one friend bought all 4 bags of pretzels and another friend bought all 4 drinks write an expression that shows the total cost
Answers
Answer:
4x+4y=total cost
Step-by-step explanation:
We are given that there was a total of 4 bags of pretzels and 4 drinks bought. We are also given to write an expression using x dollars for the pretzels and y dollars for the drinks.
To do this, we need to multiply the cost of each pretzel bag, x, by the total amount of bags of pretzels purchased.
4·x
=4x
Next, we need to multiply the cost of each drink, y, by the total number of drinks purchased:
4·y
=4y
The question is asking us to write an expression, so put 2 and 2 together:
4x+4y=total cost
Given the actual question, "Suppose instead..." the expression would be the same.
Hope this helps! :)
tan theta = 28/47 give your answer in 1 dp
Answers
theta = tan^-1(28/47) â 32.7 degrees
Therefore, the answer is 32.7 degrees (1 dp).
The value of theta in tanФ = 28/47 is 30.75° .
Given,
tanФ = 28/47
Here,
tanФ in right angled triangle measured by,
tanФ = P/B
P = perpendicular
B = base
Here,
tanФ = 28/47
Take inverse of tan to obtain the value of Ф .
Ф = [tex]tan^{-1}[/tex] (28/47)
Ф = 30.75° .
Know more about trigonometric function,
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Question is in the picture
Answers
Helppppp :((( im very lostt
Answers
Answer: Moving 4 units left
Step-by-step explanation: All you have to do is pick a point
keep the same y-coordinate. Subtract 4 from your x-coordinate.
plsssss help find the area of the shaded region
Answers
Explanation:
First you find the radius which has been given, it is 8.
You then plug it into area formula (pi r squared)
*pi = 3.14*
use a calculator and type in 3.14(8)^2
you will get 201 (rounded)
Second find the area of the square which is 12 times 12 equals 144
Now do 201-144= 57! Which is the shaded region :)
help please:( (10 points only because I have 25)
Answers
explanation
5 Figure N is a rectangular prism that has twice the volume of figure M. How many layers and how many cubes in each layer could there be in figure N?
Answers
The number of layers of M and in N in 2
How many layers and how many cubes in each layerWe do know that Figure N has twice the volume of Figure M. Since both figures are rectangular prisms, their volumes can be calculated using the formula:
Volume = length x width x height
Let's say that Figure M has a length of L, a width of W, and a height of H.
Then its volume is:
Volume_M = LWH
Since Figure N has twice the volume of Figure M, we can write:
Volume_N = 2 x Volume_M
Substituting the formula for Volume_M, we get:
Volume_N = 2LWH
This means that two layers of M and in N
The number of cubes cannot be determined with the available information
Read mroe about volume at
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a 4 year loan with 6% simple interest? Find the total amount paid, interest paid, and the monthly payment.
Answers
To find the total amount paid, interest paid, and monthly payment for a 4-year loan with 6% simple interest, we need to know the principal amount of the loan. Let's assume the principal amount is $10,000.
Total amount paid = Principal + Interest
Interest = Principal x Rate x Time
Time = 4 years
Interest = $10,000 x 0.06 x 4 = $2,400
Total amount paid = $10,000 + $2,400 = $12,400
To find the monthly payment, we can divide the total amount paid by the number of months in 4 years (48 months).
Monthly payment = $12,400 / 48 = $258.33 (rounded to the nearest cent)
Therefore, the total amount paid is $12,400, the interest paid is $2,400, and the monthly payment is $258.33.
Julie's remote control helicopter rises 15 feet in 20 seconds. what is the rate of rise in feet per hour ?
Answers
Answer:
Step-by-step explanation:
2700 feet/hour
Which number sentence is true?
Answers
Answer: D for Q 1. A for Q 2.
Step-by-step explanation:
Answer:
Step-by-step explanation:
-7 2/6>-13
is true because when u calculate the denominator by the numerator its the only real number
theta is a right angled triangle theta = tan-1(0.43) work out the value of theta give your answer to 1 decimal place
Answers
Answer: 23.3 deg
Step-by-step explanation:
if theta = tan-1(0.43), then theta is about 23.3
Answer:
23.3 deg
Step-by-step explanation:
Find the slope of the line of fit and explain its meaning in the context of the data.
80; a student who studies for 0 hours is predicted to earn 80% on the test
60; a student who studies for 0 hours is predicted to earn 60% on the test
10; for each additional hour a student studies, their grade is predicted to increase by 10% on the test
5; for each additional hour a student studies, their grade is predicted to increase by 5% on the test
Answers
it means that the score went up about 30% for each hour studying
question in the picture
Answers
Answer:
26
using sohcahtoa principle
tanx=opp/adj
i.e 14/29
therefore find the arctan of (14/29)
which gives 25.7693 approximately 2y