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Harlamova29_29 [7]
2 years ago
15

Alfred is practicing typing. The first time he tested himself, he could type 22 words per minute. After practicing for a week, h

e could
type 26 words per minute. After two weeks he could type 30 words per minute. Based on this pattern, predict how fast Alfred will be
able to type after four weeks of practice.
Mathematics
1 answer:
kondor19780726 [428]2 years ago
3 0

Answer:

34 Words Per Minute

Step-by-step explanation:

This follows the equation y=4x+18

We would replace x with the week number and solve.

4(4)+18

16+18

34

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Which of the choices below is not a possible correlation coefficient?
fiasKO [112]

Answer:

The condition for r is the following:

-1 \leq r \leq 1

And for this case if we analyze the options the only impossible value is given by:

1.0528

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Step-by-step explanation:

The correlation coefficient is a measure of dispersion and is a value between -1 and 1, and is defined as:

r=\frac{n(\sum xy)-(\sum x)(\sum y)}{\sqrt{[n\sum x^2 -(\sum x)^2][n\sum y^2 -(\sum y)^2]}}

The condition for r is the following:

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1.0528

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8 0
3 years ago
What is the slope?
Lena [83]

Answer:

3/4

Step-by-step explanation:

We need two points to find the slope

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m = (y2-y1)/(x2-x1)

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4 0
2 years ago
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PtichkaEL [24]

Answer:

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