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bekas [8.4K]
3 years ago
12

Is this positive correlation , negative correlation or no correlation?

Mathematics
2 answers:
Greeley [361]3 years ago
5 0
It’s negative! Why did the other say positive? SMH
max2010maxim [7]3 years ago
3 0
Positive correlation
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Which statement correctly describes the graph of y = x + 9.5?
Vikki [24]

Answer:

A is the answer

Step-by-step explanation:

3 0
4 years ago
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A fair coin is flipped four times. What is the probability of getting heads at least once?
Llana [10]
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Review the steps of the proof of the identity
astraxan [27]

Answer:

step 2

and then step 3 : the error neutralized the error of step 2

Step-by-step explanation:

sin(a + b) = sin(a)cos(b) + cos(a)sin(b)

and because

sin(-b) = -sin(b)

cos(-b) = cos(b)

we have

sin(a - b) = sin(a)cos(-b) + cos(a)sin(-b) =

= sin(a)cos(b) - cos(a)sin(b)

3pi/2 = 270° or -90°.

sin(3pi/2) = sin(270) = sin(-90) = -1

that means, it is the full radius straight down from the center of the circle.

cos(3pi/2) = cos(270) = cos(-90) = cos(90) = 0

so, step 1 is correct :

sin(A - 3pi/2) = sin(A)cos(3pi/2) - cos(A)sin(3pi/2) =

= sin(A)×0 - cos(A)×(-1) (correct step 2)

but as we see, the provided step 2 is incorrect.

it should have been the indicated

sin(A)×0 - cos(A)×(-1)

and NOT the provided

sin(A)×0 + cos(A)×(-1)

step 3 based on the erroneous step 2 should then have been

sin(A)×0 - (1)cos(A)

but instead another error with the sign was made that neutralized the error of step 2 and we got after this second mistake by pure chance the overall correct step 3

sin(A)×0 + (1)cos(A)

so, again, the first error was made in step 2.

but technically, there was also a consecutive error made in step 3 to bring everything back to the correct approach.

4 0
2 years ago
Make r subject of the formula <br><img src="https://tex.z-dn.net/?f=s%20%3D%204%5Cpi%20%5C%3A%20r%20%7B%7D%5E%7B2%7D%20" id="Tex
DerKrebs [107]

Answer:

r = √( s/4π)

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r² = s/4π

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r = √( s/4π)     Because r is a radius of the circle , it should be positive.

4 0
3 years ago
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Illusion [34]
16 - 12 =4 
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