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3 years ago

PLS HEEELLPP MEEEE

Mathematics

2 answers:

docker41 [41]3 years ago

6 0

Its D because if you plug in each # with x it will give you the output which is y.

Alexandra [31]3 years ago

3 0

The correct answers are A. and C.

The rate of from Table A can be calculated by finding the slope, which is $\frac{y_{2} - y_{1}}{ x_{2}- x_{1} }$ . Therefore, the slope is $\frac{60.80-30.40}{4-2}$ , which simplifies to 15.2.

The rate of Relationship B has to be more than 15.2. The slope of a line is the 'm' in the equation 'y=mx+b". In the answer choices, the 'm' values are 16.4, 14.9, 15.4, and 15.2. The only values that are greater than that are 15.4 and 16.4, so your answer is A and C.

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Answer:

$CI = (0.17 - 0.27)\± 1.65\sqrt{\frac{(0.17)*(0.83) + (0.27)*(0.73)}{200}}$

Step-by-step explanation:

Given

$n = 200$

$x_1 = 34$ -- City C

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Required

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This is calculated using:

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$\bar x = \bar x_1 - \bar x_2$

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$\bar x = \frac{34}{200} - \frac{54}{200}$

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For a 90% confidence level, the z-score is 1.65. So:

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Calculating the standard deviation $\sigma$

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$\sigma = \sqrt{(0.17)*(1 - 0.17) + (0.27)*(1 - 0.27) }$

$\sigma = \sqrt{(0.17)*(0.83) + (0.27)*(0.73)}$

So:

$CI = (0.17 - 0.27)\± 1.65\frac{\sqrt{(0.17)*(0.83) + (0.27)*(0.73)}}{\sqrt {200}}$

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2 years ago

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