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Rzqust [24]
3 years ago
15

Each of the options below describes a relationship that you need to graph on a coordinate plane. Which of the options will have

a slope of 8? Select all that apply. A) Doing 4 pages of homework in 20 minutes B) Cycling 32 miles in 4 hours C) Buying 10 shirts for $80 D) Reading 72 pages in 9 hours
Mathematics
1 answer:
ArbitrLikvidat [17]3 years ago
6 0

Answer:

B ; C; D

Step-by-step explanation:

The slope measures the rate of change in the dependent variable per unit change in the independent variable :

From the options :

Doing 4 pages of homework in 20 minutes :

The number of pages done per minute = slope

Slope = 20 / 4 = 5

To cycle 32 miles in 4 hours:.

Number of miles to cycle per hour to achieve the feat :

Slope = 32 /4 = 8

Buying 10 shirts for $80:

Cost per shirt = slope

Slope = $80 / 10

Slope = 8

Reading 72 pages in 9 hours

Number of pages read per hour :

72 / 9 = 8 pages

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You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based on previous study, you beli
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We need to sample at least 1069 parents.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

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Now, find the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

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How many parents do you have to sample?

We need to sample at least n parents.

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M = z*\frac{\sigma}{\sqrt{n}}

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