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3 years ago

Help ASAP WILL GIVE BRAINLY!! Need help on all answers/ show work

Mathematics

2 answers:

Katyanochek1 [597]3 years ago

6 0

Answer:

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natka813 [3]3 years ago

4 0

Answer: See photo

Step by step solution: See photo

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How to find slope and y-intercept with (7,9)(45,99)

nika2105 [10]

1. Slope: (Yb - Ya) / (Xb - Xa)
= (99 - 9) / (45 - 7)
= 90/38

2. Y-Intercept
Y = mx + b
9 = (90/38) * 7 + b
9 = (90/38) * (7/1) + b
9 = 630/38 + b

4 0

3 years ago

A manager is assessing the correlation between the number of employees in a plant and the number of products produced yearly. Th

Contact [7]

Answer:

A)there is a strong positive correlation

B)A function that best fits the data is $\widehat{y}=6x+10$

C)Slope indicates the rate of change of Number of products per employee

y intercept indicates number of products when number of employees are 0

Step-by-step explanation:

Number of employees (x) 0 25 50 75 100 125 150 175 200

Number of products (y) 10 160 310 460 610 760 910 1060 1210

Part A: Is there any correlation between the number of employees in the plant and the number of products produced yearly?

Mean of x values = $\frac{0+25 + 50 + 75 + 100 + 125 + 150 + 175 + 200}{9}=900$

Mean of y values = $\frac{10+160+ 310+ 460+ 610+ 760+ 910+ 1060+ 1210}{9} =610$

$\sum(x-\bar{x})^2= 37500$

$\sum(y - \bar{y})^2 = 1350000$

N =No. of observations= 9

$\sum(x - \bar{x})(y-\bar{y}) = 225000$

R Calculation

$r = \frac{\sum((x-\bar{x})(y - \bar{y}))}{\sqrt{\sum(x - \bar{x})^2(y-\bar{y})^2}}$

$r=\frac{225000}{\sqrt{(37500)(1350000)}}\\r= 1$

So, there is a strong positive correlation

B: Write a function that best fits the data.

Regression Equation = ŷ = bx + a

$b = \frac{225000}{37500} = 6\\a = \bar{y} -b \bar{x} = 610 - (6 \times 100) = 10\\ \widehat{y}= 6x + 10$

So, a function that best fits the data is $\widehat{y}=6x+10$

C)What does the slope and y-intercept of the plot indicate?

Slope indicates the rate of change of Number of products per employee

y-intercept indicates the y-coordinate of a point where a line, curve, or surface intersects the y-axis.

So, y intercept indicates number of products when number of employees are 0 .

8 0

4 years ago

NO LINKS!! Can someone please help? I'll give 25 points because I'm feeling nice. Thanks! Answer will also be marked Brainliest!

mario62 [17]

Answer:

D. - 2

Step-by-step explanation:

5(4 +2x) = -(x - 5) - 7
20 + 10x = -x + 5 -7
10x + x = -2 - 20
11x = - 22
x = -22/11
x = -2

Correct choice is D

4 0

3 years ago

Select "Yes" or "No" to indicate whether the ordered pair is on the graph of the function f(x)=−25^x+1.

KengaRu [80]

<span>(1,625) No (0,-25) No (-1,-1) No Think about what an integer exponent means for an negative base and you'll understand this problem. For instance the powers of -25 would be -25^1 = -25 -25^2 = (-25) * (-25) = 625 -25^3 = (-25)*(-25)*(-25) = -15625 and so on, giving 390625, -9765625, 244140625, etc. But that's a different subject. For the ordered pairs given, let's check them out. (1,625) -25^1 + 1 = -25 + 1 = -24. And -24 is not equal to 625, so "No". (0,-25) -25^0 + 1 = 1 +1 = 2. Note: Any real number other than 0 raised to the 0th power is 1. And 2 is not equal to -25, so "No". (-1,-1) -25^(-1) + 1 = 1/(-25^1) + 1 = 1/-25 + 1 = 24/25. And 24/25 is not equal to -1, so also "No".</span>

3 0

4 years ago

Read 2 more answers

A-project-of-construction-of-a-building-can-be-completed-by-150-workers-in-40-days-But-project-manager-brought-30-more-workers-a

IRINA_888 [86]

Answer:

In the second scenario after 16 days, 150 workers would have completed 150*16=2400 worker days. That leaves 6000-2400=3600 worker days remaining. If you add 30 workers, it would take 3600/180=20 days longer to complete. So, the entire project would take 16+20=36 days to complete.

8 0

3 years ago