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Anon25 [30]
3 years ago
7

The equation of the linear regression line represents the relationship between the number of laps a person can swim, x, and the

number of minutes a person can run, y.
y=5/2x+6

What does the slope of the line represent?
 


A. For every 2 laps that a person can swim, the number of minutes they can run increases by 5.

B. For every 5 laps that a person can swim, the number of minutes they can run decreases by 2.

C. For every 5 laps that a person can swim, the number of minutes they can run increases by 2.

D. For every 2 laps that a person can swim, the number of minutes they can run decreases by 5.
Mathematics
1 answer:
nekit [7.7K]3 years ago
4 0
The most common method for fitting a regression line is the method of least-squares. This method calculates the best-fitting line for the observed data by minimizing the sum of the squares of the vertical deviations from each data point to the line (if a point lies on the fitted line exactly, then its vertical deviation is 0). Because the deviations are first squared, then summed, there are no cancellations between positive and negative values.Example<span>The dataset "Televisions, Physicians, and Life Expectancy" contains, among other variables, the number of people per television set and the number of people per physician for 40 countries. Since both variables probably reflect the level of wealth in each country, it is reasonable to assume that there is some positive association between them. After removing 8 countries with missing values from the dataset, the remaining 32 countries have a correlation coefficient of 0.852 for number of people per television set and number of people per physician. The </span>r²<span> value is 0.726 (the square of the correlation coefficient), indicating that 72.6% of the variation in one variable may be explained by the other. </span><span>(Note: see correlation for more detail.)</span><span> Suppose we choose to consider number of people per television set as the explanatory variable, and number of people per physician as the dependent variable. Using the MINITAB "REGRESS" command gives the following results:</span>

<span>The regression equation is People.Phys. = 1019 + 56.2 People.Tel.</span>
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I dont understand please help
DiKsa [7]

2 \frac{1}{2}+(-2\frac{1}{4})

This is equal to:

2\frac{1}{2}-2\frac{1}{4}

When you add a negative number, it turns into subtraction.

First, I would change it to mixed numbers:

\frac{5}{2}-\frac{9}{4}

Now, you need to change the denominators to make sure they are the same on both fractions. I changed the first fraction's denominator to 4 so they match. You can do this by multiplying the numerator by 2:

\frac{10}{4}-\frac{9}{4}

Now, you simply subtract:

10-9=1

1/4 is your answer.

I hope this helps :)

3 0
3 years ago
The perimeter of a​ standard-sized rectangular rug is 2424 ft. the length is 22 ft longer than the width. find the dimensions.
Vaselesa [24]
X+x+22=2424
2x=2402
x=1201
1201&1223
7 0
3 years ago
HELP ME PLEASE !!!!!!!!!
Kay [80]

Answer: 33 333,33 per month or 400 000 per year

Step-by-step explanation:

You need 48 000 + 0.035X = 62 000

So ( 62 000 - 48 000 ) / 0.035 = X

Then you can divide X per 12 (months in a year)

And you have your answer per month .

So 33 333,33 total sale per month to have at least as high as the average pay

5 0
2 years ago
Eddie has saved up $45 to purchase a new camera from the local store. The sales tax in his county is 7% of the sticker price. Wr
NARA [144]


 tax gets added to the price of the camera

 so the equation is:

x + 0.07x = 45; x = $42.06

3 0
3 years ago
PLEASE HELP
Finger [1]

The range of the function is \{-19,-4,16\}

Explanation:

The function is f(n)=5n-4

The domain of the function is \{-3,0,4\}

We need to find the range of the function.

The range can be determined by substituting the values of domain in the function.

Thus, the range of the function when the domain is -3 is given by

f(-3)=5(-3)-4

         =-15-4

         =-19

Thus, the range is -19 when n=-3

The range of the function when the domain is 0 is given by

f(0)=5(0)-4

       =0-4

       =-4

Thus, the range is -4 when n=0

The range of the function when the domain is 4 is given by

f(4)=5(4)-4

       =20-4

       =16

Thus, the range is 16 when n=4

Thus, the range of the function is \{-19,-4,16\} when their corresponding domain is \{-3,0,4\}

Arranging the range in order from least to greatest is given by

\{-19,-4,16\}

Hence, the range of the function is \{-19,-4,16\}

6 0
3 years ago
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