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DochEvi [55]
2 years ago
7

WILL MARK BRAINLIEST

Mathematics
2 answers:
Nat2105 [25]2 years ago
7 0
The scale factor would be 283.3%
Burka [1]2 years ago
5 0

Answer:

283.3%

Step-by-step explanation:

6.8 divided by 2.4 = 2.83333333333

2.8333 x 100 = 283.33

= 283.3%

You might be interested in
The manager of a bookstore wants to predict Sales from Number of Sales People Working using the accompanying data set. What is t
NemiM [27]

Answer:

n=5 \sum x = 103, \sum y = 177, \sum xy= 2088, \sum x^2 =1379, \sum y^2 =3359  

And in order to calculate the correlation coefficient we can use this formula:

r=\frac{n(\sum xy)-(\sum x)(\sum y)}{\sqrt{[n\sum x^2 -(\sum x)^2][n\sum y^2 -(\sum y)^2]}}

r=\frac{10(2088)-(103)(177)}{\sqrt{[10(1379) -(103)^2][10(3359) -(177)^2]}}=0.9877

So then the correlation coefficient would be r =0.9877

And the determination coefficient for this case would be:

r^2 = 0.9877^2 = 0.9757 = 97.57 \%

And the correct option for this case would be:

A. The value of Upper R squared is 97.57​%, which is the percentage of variance in Sales that can be accounted for by the regression of Sales on Number of Sales People working.

Step-by-step explanation:

The correlation coefficient is a "statistical measure that calculates the strength of the relationship between the relative movements of two variables". It's denoted by r and its always between -1 and 1.

For this case we have the following data:

N. sal. peop.  work.            Sales (in $1000)

2                                                  10

3                                                  12

6                                                  14

8                                                  15

10                                                 17

10                                                 19

11                                                  19

16                                                 23

17                                                 23

20                                                25

We assume that the Number of Sales represent (X) and Sales (in $1000) represent (Y), we have this:

n=5 \sum x = 103, \sum y = 177, \sum xy= 2088, \sum x^2 =1379, \sum y^2 =3359  

And in order to calculate the correlation coefficient we can use this formula:

r=\frac{n(\sum xy)-(\sum x)(\sum y)}{\sqrt{[n\sum x^2 -(\sum x)^2][n\sum y^2 -(\sum y)^2]}}

r=\frac{10(2088)-(103)(177)}{\sqrt{[10(1379) -(103)^2][10(3359) -(177)^2]}}=0.9877

So then the correlation coefficient would be r =0.9877

And the determination coefficient for this case would be:

r^2 = 0.9877^2 = 0.9757 = 97.57 \%

And the correct option for this case would be:

A. The value of Upper R squared is 97.57​%, which is the percentage of variance in Sales that can be accounted for by the regression of Sales on Number of Sales People working.

5 0
3 years ago
Which statement is true about the polynomial 3x^2y^2-5xy^2-3x^2y^2+2x^2
Svetlanka [38]

Answer: <em><u>It has 2 terms and a degree of 3.</u></em>

Step-by-step explanation: There are two terms and the degree is the highest sum of the exponents of x and y in a term, which is 3.

5 0
3 years ago
It snowed 4. Times during October. The snowfall amounts were 0.75 inches, 1.93 inches,4.73 inches, and 2.33 inches. What was the
Arada [10]
9.74 inches is what I came up with.
8 0
3 years ago
Read 2 more answers
The graphs of y = f(x) and y = g(x) are shown on the coordinate plane below. If g(x) = k* f(x), what is the value of k?
mixer [17]

Answer:

Value of k = -2

Step-by-step explanation:

Using slope intercept form:

The equation of line is given by:

y = mx+b

where, m is the slope and b is the y-intercept.

As per the statement:

The graphs of y = f(x) and y = g(x) are shown on the coordinate plane.

First find f(x):

Consider two points on y=f(x) are:

(0,-3) and (2, 1)

Formula for slope:

\text{Slope(m)} = \frac{y_2-y_1}{x_2-x_1}

then;

m = \frac{1-(-3)}{2-0}=\frac{4}{2} = 2

then;

y = 2x+b

Substitute the point (0, -3) to solve for b:

-3= 2(0)+b

⇒-3=b

∴ y=f(x)=2x-3

Similarly for g(x):

Consider two points on y = g(x) are:

(0, 6) and (2, -2)

then;

\text{Slope(m)} = \frac{y_2-y_1}{x_2-x_1}

then;

m = \frac{-2-6}{2-0}=\frac{-8}{2} =-4

then;

y = -4x+b

Substitute the points (0, 6) to solve for b:

6= -4(0)+b

⇒6=b

then we get an equation:

y = g(x) = -4x+6

It is given that: If g(x) = k* f(x)

Solve for k:

-4x+6 = k(2x-3)

⇒-4x+6 = 2kx-3k

on comparing both sides we have;

-2kx = -4x

⇒-2k = -4

Divide both sides by -2 we have;

k = 2

or

-3k = 6

⇒k = -2

Therefore, the value of k is, -2

7 0
3 years ago
Read 2 more answers
Simple Easy Question 10 point just for a answer
Ad libitum [116K]

Answer:

D: 50

Step-by-step explanation:

Count them one by one!

8 0
3 years ago
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