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natita [175]
3 years ago
9

(Please Help me) Read all of it?

Mathematics
1 answer:
Alinara [238K]3 years ago
4 0

Answer:

42 easy :)

Step-by-step explanation:

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Draw a number line between -5 and 5. Fill the number line with at least 10 rational numbers and 10 irrational numbers and shows
Kamila [148]
4 or something if wrong lmk
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3 years ago
5. Rounded to three decimal places, what is the value of r for this data set?
IrinaVladis [17]

The value of correlation coefficient (r) for the dataset is 0.981

<h3>What is correlation coefficient (r)?</h3>

The correlation coefficient (r) is used to determine the closeness and association of a scatter plot points.

The dataset is given as:

  • x: 8  15  3  7  2  14
  • y: 15  21  6  12  3  20

Using a graphing calculator, we have the following parameters:

<h3>X Values </h3>
  • ∑x = 49
  • Mean = 8.167
  • ∑(X - Mx)2 = SSx = 146.833

<h3>Y Values </h3>
  • ∑y = 77
  • Mean = 12.833
  • ∑(Y - My)2 = SSy = 266.833

<h3>X and Y Combined </h3>
  • N = 6
  • ∑(X - Mx)(Y - My) = 194.167

The correlation coefficient (r) is then calculated as:

r = \frac{\sum{((x - My)(Y - Mx)) }}{ \sqrt{((SSx)(SSy))}}

This gives

r = \frac{194.167 }{ \sqrt{((146.833)(266.833))}}\\

r = 0.9809

Approximate

r = 0.981

Hence, the value of correlation coefficient (r) for the dataset is 0.981

Read more about correlation coefficient at:

brainly.com/question/4219149

3 0
2 years ago
Brady recorded the number and color of cars in the parking lot. 45% of the cars in the parking lot were white. If Brady counted
MA_775_DIABLO [31]

Answer:

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Step-by-step explanation:

Like you can see in the picture, I like to set up a proportion, so 81 over X and 45 over 100. Then, you can cross multiply, so 81 x 100 = 8100 and then divide, 8100 ÷ 45 = 180, your answer!

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The answer is most likely B
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M=0.75d - 2 proportional or non proportional?
ArbitrLikvidat [17]

Answer:

Non proportional

Step-by-step explanation:

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