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nadezda [96]
3 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]3 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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Groceries cost $75. The tax is 5%. Will you have enough money to pay for the groceries if you have $80. Please explain.
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Answer:

Yes, we have enough money to pay for the groceries.

Step-by-step explanation:

We are given that Groceries cost $75. The tax rate is 5%.

We have to check that will the amount of $80 enough to pay for the groceries or not.

<em>For this we will firstly calculate the total cost of groceries after applying tax rate of 5% on groceries. </em>

Cost of groceries after applying tax rate is given by;

Since we know that by applying a tax on any item it's cost gets increased.

So, <u>Cost of groceries after tax</u> = Cost of groceries before tax + Amount of tax      

Amount of tax = Tax rate \times Cost of groceries

                        = 5% \times $75

                        = \frac{5}{100} \times 75 = $3.75

So, Cost of groceries after tax = $75 + $3.75 = $78.75

Since we have an amount of $80 with us which means that we are able to buy the groceries after giving tax on it as $78.75 < $80.

Therefore, yes we have enough money to pay for the groceries.

<em />

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4 years ago
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3 years ago
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So.. check the picture below

that's when the profit gets maximized

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Answer:

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Step-by-step explanation:

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