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3 years ago

What is the product of 60 and 91?

Mathematics

1 answer:

gladu [14]3 years ago

8 0

The product of 60 and 91 is 5,460.

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What is the equation of the best-fitting regression line? Find this in two ways. First, using the regression analysis part of th

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Step-by-step explanation:

Regression analysis is used to infer about the relationship between two or more variables.

The line of best fit is a straight line representing the regression equation on a scatter plot. The may pass through either some point or all points or none of the points.

Method 1:

Using regression analysis the line of best fit is: $y=\alpha +\beta x+e$

Here α = intercept, β = slope and e = error.

The formula to compute the intercept is:

$\alpha =\bar y-\beta \bar x$

Here $\bar y$ and $\bar x$ are mean of the y and x values respectively.

$\bar y=\frac{\sum y_{i}}{n} \\\bar x=\frac{\sum x_{i}}{n}$

The formula to compute the slope is:

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

And the formula to compute the error is:

$e=y-\alpha -\beta x$

Method 2:

The regression line can be determined using the descriptive statistics mean, standard deviation and correlation.

The equation of the line of best fit is:

$(y-\bar y)=r\frac{\sigma_{x}}{\sigma_{y}} (x-\bar x)$

Here r = correlation coefficient = $r=\frac{Cov (x,y)}{\sqrt{\sigma^{2}_{x}\sigma^{2}_{y}} }$

$\sigma_{x}$ and $\sigma_{y}$ are standard deviation of x and y respectively.

$\sigma_{x}=\frac{1}{n}\sum (x-\bar x)^{2} \\\sigma_{y}=\frac{1}{n}\sum (y-\bar y)^{2}$

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3 years ago

This graph represents the positions of two turtles in a race.On the same axes, draw a line for a third turtle that is going half

brilliants [131]

Answer:

step g

Step-by-step explanation:

it axis is giong up more than other turtle which makes more sense.

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2 years ago

What is the slope of the line? -4x+7=2y-3

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Answer: -2

In order to find the slope of this equation you must put it into slope form which is y=mx+b
Solved: y= -2+5
M is the slope

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2 years ago

please help in the picture below (top left is A) (bottom left is B) top right is C ) and bottom right is D) (will report for non

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For this you count rise over run aka how many up divided by how many over starting from 0. here it’s 7 up and 3.5 side, 7 divided by 3.5 is 2 and the line is going down so it’s negative 2 (D)

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3 years ago

Read 2 more answers

C. Look for Relationships How do the processes you used for parts A and B differ? How are they the same?

olga_2 [115]

Step-by-step explanation:

Relationship is a ver beautiful friend one answer

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2 years ago