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riadik2000 [5.3K]
3 years ago
12

Suppose the line of best fit is being found for some data points that have an r-value of 0.657. If the standard deviation of the

x-coordinates is 2.445, and the standard deviation of the y-coordinates is 9.902, what is the slope of the line to three decimal places?
Mathematics
2 answers:
oksian1 [2.3K]3 years ago
5 0
We are given a line with the following data:

r-value = 0.657 (r)
standard deviation of x-coordinates = 2.445 (Sx)
standard deviation of y-coordinates = 9.902 (Sy)

We are asked to find the slope of the line up to 3 decimal places.

To find the slope of the line, based on the data that we have, we can use this formula:

slope, b = r * (Sy / Sx) 

substitute the values to the formula:

b = 0.657 * ( 9.902 / 2.445 )

Solve for the b.

Therefore, the slope of the line is 

b = 2.66078, round off to three decimal places:

b = 2.661 is the slope of the line. 
castortr0y [4]3 years ago
5 0

Answer: 2.661

Step-by-step explanation:

A P E X

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Given:

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To find the total milkshakes sold.

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Let the total number of milkshakes sold on Monday be = x

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Number of milk shakes with added whipped cream can be given as:

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⇒ 0.7x  [evaluating in decimals]

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0.7x=210

Solving for x

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