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Svet_ta [14]
4 years ago
15

PLEASE HELP ASAP! What is the r-value of the following data, to three decimal places?

Mathematics
2 answers:
Kobotan [32]4 years ago
5 0
A) Find the Sum of the X values: 4 +5+8+9+13 = 39

B) Find the Sum of the Y values: 23 +12 +10 +9 +2 = 56

C) Find the Sum of x^2: 4^2 + 5^2 + 8^2 + 9^2 +13^2 = 355

D) The sum of the Y^2's: 23^2 + 12^2 + 10^2 + 9^2 + 2^2 = 858

E) Sum of x *y's: 4*23 + 5*12 + 8*10 + 9*9 + 13*2 = 339

N = number of sets = 5

Numerator of r = (E - A*B/N) = 339-39*56/5 = 339 - 436.8 = -97.8

Denominator of r = SQRT(C-A^2/N) x SQRT(D-B^2/N) = 
SQRT(355-39^2/5) x SQRT(858-56^2/5) =
SQRT(50.8) x SQRT(230.8) =
7.1274 x 15.1921 =
108.2803

r = -97.8 / 108.2803

r = -0.903

 Answer is A

lions [1.4K]4 years ago
5 0

Answer: A -0.903****

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Answer:

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Step-by-step explanation:

Option A is incorrect because you cannot use the slope because you don't know where or what point to start from.

<em>Option B is correct because the first thing you do is plot the y intercept of -4 and then you find the slope of the line.</em>

<em />

Option C is incorrect because you cannot use the slope because you don't know where or what point to start from.

Option D is incorrect because that is the wrong y intercept.

Answer:  Option B, y intercept of -4

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just olya [345]

\boxed{\frac{2}{3}=\frac{6}{9}}

Step-by-step explanation:

The equation we are given is the following:

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A proportion is a relationship between two ratios. This tells us that two ratios are equal. That is, suppose you have two ratios:

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Then, we can write a proportion as follows:

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For:

2\cdotp9=3\cdotp6

If you divide both sides by (3)(9):

\frac{1}{3\cdotp9}(2\cdotp9)=\frac{1}{3\cdotp9}(3\cdotp6) \\ \\ \boxed{\frac{2}{3}=\frac{6}{9}}

<h2>Learn more:</h2>

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3/5

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= 6/6 * 3/5 = 1 * 3/5 = 3/5

4 0
3 years ago
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How would u solve this
astraxan [27]

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congruent angle pair

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angles 2 and 3 are congruent(equal 90 degrees), and angles 3 and 6 are opposite each other, indicating that they are of equal measure. therefore, angles 2 and 6 and congruent.

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