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nadezda [96]
2 years ago
8

An instructor reports that as the number of student interruptions during class decreases, student scores on in-class quizzes inc

rease. Is this an example of a positive correlation or a negative correlation?
Mathematics
1 answer:
jekas [21]2 years ago
6 0

Answer:

Negative correlation

Step-by-step explanation:

In a negative correlation, as one variable increases, the other variable decreases, and as one variable decreases, the other variable increases. In positive correlation, as one variable increases, so does the other and as one variable decreases, so does the other.

In the given question, as the number of student interruptions during class decreases, student scores on in-class quizzes increase. So, this an example of a negative correlation.

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Isolate the variable by dividing each side by factors that don't contain the variable.

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5 0
3 years ago
Help please!!!
Maslowich

y varies directly with x.

The constant of variation is k = 7

Step-by-step explanation:

We have to check whether both vary directly with each other or not.

Every pair of x and y will be considered one by one

If y varies directly with x, it should satisfy y = kx or k = yx

So,

For x= -2, y=-14

-14 = -2k\\k = \frac{-14}{-2}\\k = 7

For

x=3, y=21

21 = 3k\\ k = \frac{21}{3}\\k = 7

For

x=5, y=35

35 = 5k\\ k = \frac{35}{5}\\k = 7

As k is same for all pairs of x and y, it can be concluded that:

y varies directly with x.

The constant of variation is k = 7

Keywords: Proportion, variation

Learn more about proportion at:

  • brainly.com/question/10703930
  • brainly.com/question/10772025

#LearnwithBrainly

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3 years ago
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