Answers
Answers:
8) Choices E, F and G9) r = -0.9510) 0.9 (choice C)11) Choice C. y1 = mx1+b12) Choice B. Slope13) Choice C. y intercept========================================================
Explanations:
8) Positive r values always go with positive regression slopes. The r value will likely not equal the slope, but they share the same sign.
------------------------------
9) The data set isn't given so I'm not sure. But it seems like your teacher just wants to know a hypothetical situation in which r value will produce the best fit. That would be r = -0.95 since we're the furthest from zero. The closer you are to r = 1 or r = -1, the better the fit.
------------------------------
10) The blue regression line, aka line of best fit, is fairly close to all of the data points. Also, the blue line has a positive slope. This means r is fairly close to 1. So that's why we go with r = 0.9
------------------------------
11) The general equation is y = mx+b. We simply replace x,y with x1,y1.
------------------------------
12) When considering y = mx+b, the m is the slope. I'm not entirely sure where the m comes from, but I've read some sources that say 'm' somehow represents 'mountain' which involves slopes. This could have simply been a memorization tool and not the actual reason why m was chosen to be the slope.
As an example, y = 2x+5 has slope 2.
------------------------------
13) The b in y = mx+b is the y intercept. It's the initial value.
It always occurs when x = 0 since
y = mx+b
y = m*0+b
y = b
Meaning the point (0,b) is the location of the y intercept.
For example, y = 2x+5 has y intercept 5 located at the point (0,5).
Related Questions
Find the length of the third side. If necessary, round to the nearest tenth.
2
3
Answers
Answer:
The third side is 3.6
Step-by-step explanation:
Incomplete question;
The parameter from the complete question can be summarized as follows:
[tex]Side\ 1 =2[/tex]
[tex]Side\ 2 =3[/tex]
Required
Determine the third side (hypotenuse)
Let the third side be x;
So:
[tex]x^2 = Side\ 1^2 + Side\ 2^2[/tex]
[tex]x^2 = 2^2 + 3^2[/tex]
[tex]x^2 = 4 + 9[/tex]
[tex]x^2 = 13[/tex]
Take square roots of both sides
[tex]x = 3.6[/tex]
Natasha was thinking of a number. Natasha subtracts 9.3 from the number and gets an answer of 86.7. Form an equation with
x
Answers
Answer:
x-9.3 = 86.7
Step-by-step explanation:
Help me please I need help .
Answers
Answer:
cos A =1.0
sin B=0.02
tan C=9.1
does anyone know the answer?
Answers
Answer:
multiply the bottom equation by 6
Alice, Bernice, and Carol have £600 altogether. The ratio of Alice’s money to Bernice’s money is 3:7. Carol has £60 more than Alice. What is the amount of money each girl got?
Answers
Answer:
Alice - £124.62
Bernice - £290.77
Carol - £184.62
Step-by-step explanation:
Let the amount of money Alice has be a. This way, the sentence "The ratio of Alice’s money to Bernice’s money is 3:7." can be translated into a proportion:
Alice's money / Bernice's money = 3 / 7
We can substitute Alice's money with a, and cross multiply and solve for Bernice's money:
a / Bernice's money = 3 / 7
7a = 3(Bernice's money)
Bernice's money = 7/3 a
Now, we can represent Carol's money in terms of Alice's money, she has 60 more, or a + 60. We can create can equation to represent the total:
Alice's money + Bernice's money + Carol's money = total
We can plug in what we have and solve for a:
a + 7/3 a + a + 60 = 600
13/3 a = 540
a = 124.62
This means Alice has £124.62
Bernice has 7/3 a amount of money, so we can substitute the value of a to get Bernice has 7/3 (124.62), or £290.77
We can do the same for Carol who has 60 more, 124.62 + 60 is £184.62
I need help but they are getting confused with the z as a 2 please don’t get confused the z is a z
Answers
Step-by-step explanation:
everything can be found in the picture
Answer:
w = - (7/2) z
Step-by-step explanation:
5w + 9z = 2z + 3w
Subtract 3w from both sides
2w + 9z = 2z
Subtract 9z from both sides
2w = -7z
Divide both sides by 2
w = - (7/2) z
Which expression has a value of 3
A. (12 + 6) ÷ (3 + 3)
B. 12 + (6 ÷ 3 + 3)
C. (12 + 6) ÷ 3 + 3
D. 12 + 6 ÷ (3 + 3)
Answers
Answer:
(12 + 6) / (3 + 3) = 18 / 6 = 3
your answer is : (12 + 6) / (3 + 3)
Answer:
A
Step-by-step explanation:
A) 18/6 = 3
B) 12+5 = 17
C) (18 / 3) + 3 = 9
D) 12 +(6/6) = 13
The conditional relative frequency table was calculated by row using data from a survey of one station’s television programming. The survey compared the target audience with the type of show, either live or recorded, over a 24-hour time period.
A 4-column table with 3 rows titled television programming. The first column has no label with entries adult, children, total. The second column is labeled live with entries 0.625, 0.5, nearly equal to 0.583. The third column is labeled recorded with entries 0.375, 0.5, nearly equal to 0.417. The fourth column is labeled total with entries 1.0, 1.0, 1.0.
Which is the best description of the value 0.375 in the table?
Given that the program was targeted at adults, there is a 37.5% chance that it was recorded.
Given that the program was recorded, there is a 37.5% chance that it was targeted at adults.
37.5% of the programs are targeted at adults.
37.5% of the programs are recorded.
Answers
Answer:
37.5% of the programs are targeted at adults
Step-by-step explanation:
The following figure shows the given four column table for the target audience of television programming
[tex]\begin{array}{lllc}&Television \ Programming \\& Live&Recorded&Total\\Adult&0.625&0.375&1.0\\Children&0.5&0.5&1.0\\Total&\approx 0.583& \approx 0.417&1.0\end{array}[/tex]
From the table, we have that the best description of the value 0.375 in the table is that the percentage of television program targeted at adults is 37.5%
Answer:
The answer is a “Given that the program was targeted at adults, there is a 37.5% chance that it was recorded”
Step-by-step explanation:
i did the test
If f(x) = 5x + 3, what is the value of f(-2)?
Answers
Step-by-step explanation:
it's called answer is minus 7
Answer:
[tex]{ \tt{f(x) = 5x + 3}} \\ { \tt{f( - 2) = 5( - 2) + 3 }}\\ { \bf{f( - 2) = - 7}}[/tex]
Given two similar cylinders with a height ratio of 2:3 what is the ratio of their volumes?
Answers
Answer:
8 : 27
Step-by-step explanation:
The ratio of the volumes is the ratio of the scale factor cubed
2^3 : 3^3
8 : 27
Answer:
8 : 27
Step-by-step explanation:
Given 2 similar cylinders with height ratio = a : b , then
ratio of volumes = a³ : b³
Here height ratio = 2 : 3
ratio of volumes = 2³ : 3³ = 8 : 27
What is the area of triangle ABC?
3 square units
O 7 Sguare units
11 square units
15 square units
Answers
Answer:
3
Step-by-step explanation:
base = 4-1
= 3
height = 3-1
= 2
Area = 1/2 (b)(h)
= 1/2 (3)(2)
= 3
therefore the answer is 3 square unit
A small pebble is stuck in Jim's bike tire. The wheel has a radius of 34 cm. Determine the equation of the function that expresses the height of the pebble from the ground in terms of the distance that the bike travels from the point where the pebble got stuck in the tire. How high off the ground will the pebble be after the tire has rolled 150 cm?
Answers
Answer:
distance = 68 pie x
Step-by-step explanation:
Hope this helps
Please help I’ll give brainliest
Answers
Answer:
1000 cubic metre
Step-by-step explanation:
hopes it help
Answer:
solution,
length=10 cm
volume=?
now,
volume of cube=l×l×l
=10×10×10
therefore,the answer is 1000 cubic centimeter
How to sketch the graph?
Answers
Step-by-step explanation:
sketch the mother function of |x| then go 3 steps to the right horizontally and that's it
Express your answer as a polynomial in standard form.
f(x) = 2x + 7
g(x) = 2x2 - 6x +5
Find: g(f(x))
Answers
Answer:
[tex]16x^{2}+44x+61[/tex]
Step-by-step explanation:
g(f(x)) means that you substitute f(x) as x in g(x)
[tex]2(2x+7)^{2}-(6)(2x+7)+5[/tex]
expand
(2x+7)(2x+7)=
4x^2+28x+49
(2)(2x+7)(2x+7)=16x^2+56x+98
16x^2+56x+98-12x-42+5
16x^2+44x+61
If f(x) = 5x, what is rx)?
Answers
Answer:
18x
Step-by-step explanation:
If f(x) is 5x which can also be expressed 5(x)
Then r(x) is a number then x
f is the fifth digit in the alphabet
So fx is 5x
r is the 18 th letter so
18x
Which best describes the strength of the model?
O a weak positive correlation
O a strong positive correlation
O a weak negative correlation
O a strong negative correlation
Answers
Answer:
A weak positive correlation
Step-by-step explanation:
The table of values of the women's age to shoe size is presented as follows;
Women's Age and Shoe Size
[tex]\begin{array}{ccc} Age&&Shoe \, size\\18&&7\\30&&10\\52&&6\\64&&9\end{array}[/tex]
We get;
The correlation coefficient, r, is given as follows;
[tex]r = \dfrac{\sum \left(x_i - \overline x \right ) \cdot \left(y_i - \overline y \right )}{\sqrt{ \sum \left(x_i - \overline x \right )^2 \cdot \sum \left(y_i - \overline y \right )^2}}[/tex]
From MS Excel, we have;
[tex]\sum \left(x_i - \overline x \right ) \cdot \left(y_i - \overline y \right )[/tex] = 2
[tex]\sqrt{ \sum \left(x_i - \overline x \right )^2 \cdot \sum \left(y_i - \overline y \right )^2}[/tex] = √13,000 = 10·√130
∴ r = 2/(10·√130) ≈ 0.01754
Therefore, given that the calculated correlation coefficient, r is positive and less than 0.2 (weak), we have
The correlation is a weak and positive.
Chef Antonio works at a Latin restaurant and doing a great job. During his yearly evaluation, the owner increased his salary from $42,500 to $46,000. What is the percent of increase, to the nearest whole percent, in Chef Antonio's salary?
Answers
Answer:
8%
Step-by-step explanation:
To find the percent change, we first have to find the amount changed, which is (46000-42500) = 3500. Then, we find what percentage that is of the original amount. Remember that when calculating percentage change, it's important to calculate change with respect to the initial value.
To find the percentage, we can divide 3500 by 42500, and multiply that by 100, resulting in 8 being our nearest whole percent
Charlie has $775 saved up.
He plans on spending about
$50 a week on food. Write
an equation to represent y.
the amount of money he has
left after x weeks?
Answers
Answer:
y = -50x +775
Step-by-step explanation:
expand (y+1)(y-4) !!!!!!
Answers
Answer:
Step-by-step explanation:
y^2 - 4y + y - 4
y^2 - 3y - 4
Write "five thousand six hundred eighty-five and twelve hundredths" in expanded form
Answers
Answer:
56851200
Step-by-step explanation:
The expanded form of the number is 5000 + 600+ 80 + 5 + 0.1 + 0.02 and the number is 5685.12
What is number?A number is a mathematical entity that can be used to count, measure, or name things. For an example, 1, 2, 56 etc. are the numbers.
It is given that:
The word expression:
"five thousand six hundred eighty-five and twelve hundredths"
The number would be:
= 5685.12
In the expanded form the number can be written as:
The expanding form can be used to indicate the value of each digit in a number in arithmetic.
Numbers that are expressed as the sum of each digit multiplied by its place value are known as expanded numbers.
Expanded Form:
5685.12 = 5000 + 600+ 80 + 5 + 0.1 + 0.02
Thus, the expanded form of the number is 5000 + 600+ 80 + 5 + 0.1 + 0.02 and the number is 5685.12
Learn more about the number here:
brainly.com/question/17429689
#SPJ2
Four spheres of radius 6 cm just fit inside a cylinder.
Calculate the volume inside the cylinder that is empty.
Leave your answer in terms of pi.
Answers
Answer:
1152\pi\
Step-by-step explanation:
3g - 4 = 17
show ur work
Answers
Answer:
g = 7
Step-by-step explanation:
3g - 4 = 17
+ 4 + 4
3g = 21
÷3 ÷3
g = 7
Answer:
g=7
Step-by-step explanation:
First add 17+4=21 to find out how much 3g needs to equal. 3g needs to get to 21. Next, do 21/3=7. g=7
Hope this helps!
Jo invests 20 000.
in the first year her investment grows 20%
then in the second year her investemnt loses 10% of its value.
work out the investment after 2 years?
Answers
Answer:
21600
Step-by-step explanation:
20000*1.2*.9=21600
Which fraction is represented by point A on the number line?
Answers
Answer:
-1/3
(the second choice)
A John and Kate share £180 in the ratio
2:3. Work out how much money each person
receives.
Answers
Answer:
John's share = £72
Kate's share = £108
Step-by-step explanation:
Given:-
Share amount of John and Kate = £180
Share amount given in ratio = 2:3
Find:-
Work out how much money each person
receives.
Solution:-
Ratio:
John Kate
2 : 3
Add the ratio:
2 + 3 = 5
Divide the total amount from the added ratio:
180 / 5 = 36
Each part of the ratio is 36.
John's amount:
{multiply 36 with 2}
36 × 2 = £72
Kate's amount:
{multiply 36 with 3}
36 × 3 = £108
(CHECK:- £108 + £72 = £180 )
(2x2 + 4x + 1) + (3x2 + 6x + 5)
Answers
Answer:
5x^2+10x+6
Step-by-step explanation:
Kharter goes to a gas station near his house where it costs $2.95 per gallon. Kharter’s car hold’s 13.2 gallons. The gas station near Devin’s house sells gas for $3.03 per gallon and his car holds 11.8 gallons
Answers
Classify the following triangle. Check all that apply.
Answers
Answer:
Option(B) & Option(C)
Step-by-step explanation:
Right angled triangle (One angle is 90 degree)
Isosceles(Two sides of triangle are equal)
Use numerals instead of words
Answers
Answer:
Step-by-step explanation:
Put in the 3 and 4 so it is the square root of 3^4 - -6^2
The square root of 3^4 + 6^2
The square root of 3^4 is 3^2 so
9 + 6^2
=> 9 + 36
=> 45
45 in numerals is XLV