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3 years ago

12

Find the equation of straight line which cuts the x and y axis 4,9 units

1 answer:

MrRa [10]3 years ago

7 0

Is the the line veritcal or horizontal,if its vertical then the slope is undefined, if its horizontal then it should be zero leading to y=4÷9 or y=0.44

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Please consider the following values for the variables X and Y. Treat each row as a pair of scores for the variables X and Y (wi

Studentka2010 [4]

Answer:

The Pearson's coefficient of correlation between the is 0.700.

Step-by-step explanation:

The correlation coefficient is a statistical degree that computes the strength of the linear relationship amid the relative movements of the two variables (i.e. dependent and independent).It ranges from -1 to +1.

The formula to compute correlation between two variables <em>X</em> and <em>Y</em> is:

$r(X, Y)=\frac{Cov(X, Y)}{\sqrt{V(X)\cdot V(Y)}}$

The formula to compute covariance is:

$Cov(X, Y)=n\cdot \sum XY-\sum X \cdot\sum Y$

The formula to compute the variances are:

$V(X)=n\cdot\sum X^{2}-(\sum X)^{2}\\V(Y)=n\cdot\sum Y^{2}-(\sum Y)^{2}$

Consider the table attached below.

Compute the covariance as follows:

$Cov(X, Y)=n\cdot \sum XY-\sum X \cdot\sum Y$

$=(5\times 165)-(30\times 25)\\=75$

Thus, the covariance is 75.

Compute the variance of X and Y as follows:

$V(X)=n\cdot\sum X^{2}-(\sum X)^{2}\\=(5\times 226)-(30)^{2}\\=230\\\\V(Y)=n\cdot\sum Y^{2}-(\sum Y)^{2}\\=(5\times 135)-(25)^{2}\\=50$

Compute the correlation coefficient as follows:

$r(X, Y)=\frac{Cov(X, Y)}{\sqrt{V(X)\cdot V(Y)}}$

$=\frac{75}{\sqrt{230\times 50}}$

$=0.69937\\\approx0.70$

Thus, the Pearson's coefficient of correlation between the is 0.700.

5 0

3 years ago

Can someone please help me extra points

Maslowich

Answer:

4) m: 1.25 b: 6 Equation: y= 1.25x + 6

5) m: 20 b: 10 Equation: y= 40x + 10

6) m: -2 b: 0 Equation: y= -2x + 0

7) m: 1/5 b: 1 Equation: y= 1/5x + 1

8) -8.7 = 1.3x + 0

I really hope this helps!

3 0

3 years ago

Start by finding the scale of this map. At the actual gym, one side length of the snack stand is 60 feet. On the scale map, it i

Elenna [48]

Answer:

I actual foot represents 0.01093 foot on paper

Step-by-step explanation:

Given that :

Actual side length of snack stand = 60 feets

Length of side on map = 20cm

Scaie :

60 feet = 20cm

1 foot = (20/60) cm

1 foot = 0.333 cm

1cm = 0.0328084 foot

0.333cm = (0.33 * 0.0328084) = 0.01093 feets

Scale :

I actual foot represents 0.01093 foot on paper

3 0

3 years ago

The length of a square tile is 3w centimeters. Alice places 4 square tiles in a row to form a rectangle. Find the perimeter of t

Gennadij [26K]

12,3x4=12
w=12
hope i helped you

3 0

4 years ago

Whats 1500x1500+(1/5- 2/6) divided by 28=?

Ilya [14]

Answer:

2249999.99524

Step-by-step explanation:

The answer would be 2249999.99524

Or just 224999

Sorry for the last answer!

5 0

2 years ago