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3 years ago

Do the data in the table represent a direct variation or an inverse variation write an equation to model the data in the table.

Mathematics

2 answers:

astraxan [27]3 years ago

6 0

The answer is C. xy=40

umka21 [38]3 years ago

3 0

If we inspect the table we can see that $y$ decreases with $x$ and $xy=40$ . Hence the data in the table represents inverse variation.

Since $y=\frac{40}{x}$ . $y$ is inversely proportional to $x$ .

The correct choice is (C).

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What is the slope of the line?

Sav [38]

Answer:

Slope: 3

Step-by-step explanation:

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3 years ago

Of 585 samples of seafood purchased from various kinds of food stores in different regions of a country and genetically compared

Dafna1 [17]

Answer:

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c) The confidence interval calculation take into account the sample size, so the width (or precision) of the interval depends on the sample size.

The only criticism that could be analyzed is to see if the sample is representative of the population.

Step-by-step explanation:

a) We have to calculate a 99% confidence interval for the proportion.

The sample proportion is p=0.19.

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$\sigma_p=\sqrt{\dfrac{p(1-p)}{n}}=\sqrt{\dfrac{0.19*0.81}{585}}\\\\\\ \sigma_p=\sqrt{0.000263}=0.016$

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The margin of error (MOE) can be calculated as:

$MOE=z\cdot \sigma_p=2.576 \cdot 0.02=0.042$

Then, the lower and upper bounds of the confidence interval are:

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The 99% confidence interval for the population proportion is (0.148, 0.232).

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3 years ago

What is the value of x in the equation 3x − 31 = 76

Maru [420]

Add 31 to both sides.

3x−31+31=76+31

3x=107

Divide both sides by 3.

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3 years ago

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Ostrovityanka [42]

Answer:

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To find the upper upper bound, we add half of the level of precision to her estimate.

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