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Levart [38]
4 years ago
11

(1.) Which Table shows a proportional relationship between x and y?

Mathematics
2 answers:
ch4aika [34]4 years ago
8 0
Hey, I'm Daniel and I'm here to help you!

(1.) is B, which is the second choice above.
(2.) is C, which is <span>Proportional: $50 per month

I hope I've helped and I am always here for any of you guys, so contact me if you need anything!
 Bye:)</span>

alexira [117]4 years ago
3 0

The second picture represents the same relation between x and y and the proportional ratio of dollar to month is \boxed{\$ 50{\text{ per month}}}.

Further explanation:

The relation is defined as the relationship between the input values and output values.

In the interval \left({x,y}\right) the first value represents the x and the second value is y.

The x coordinates are the domain of the function and the y coordinates are the range of the function.

Explanation:

The ratios of x and y of first picture can be calculated as follows,

\dfrac{1}{5}\dfrac{3}{{12}}=\dfrac{1}{3}

The ratios of x and y are not equal. Therefore, in the first picture x and y are not in a proportional relationship.

The ratios of x and y of second picture can be calculated as follows,

\begin{aligned}\frac{1}{3}\\\frac{2}{6}&=\frac{1}{3}\\\frac{4}{{12}}&= \frac{1}{3}\\\frac{5}{{15}}&=\frac{1}{3}\\\end{aligned}

The ratios of x and y are equal. Therefore, in the second picture x and y are in a proportional relationship.

\begin{aligned}\Dfrac{0}{4}&= 0\\\dfrac{2}{8}&=\frac{1}{4}\\\end{aligned}

The ratios of x and y are not equal. Therefore, in the third picture x and y are not in a proportional relationship.

The ratios of x and y of fourth picture can be calculated as follows,

\begin{aligned}\frac{1}{4}&=\frac{1}{4}\\\frac{2}{{10}}&=\frac{1}{5}\\\end{aligned}

The ratios of x and y are not equal. Therefore, in the third picture x and y are not in a proportional relationship.

The ratio of dollars to months can be obtained as follows,

\begin{aligned}\frac{{100}}{2}&= 50\\\frac{{150}}{3}&= 50\\\frac{{250}}{5}&= 50\\\frac{{400}}{8}&= 50\\\end{aligned}

The dollars and months are in a proportional with ratio 50:1.

The second picture represents the same relation between x and y and the proportional ratio of dollar to month is \boxed{\$ 50{\text{ per month}}}.

Kindly refer to the image attached.

Learn more:

1. Learn more about inverse of the functionhttps://brainly.com/question/1632445.

2. Learn more about equation of circle brainly.com/question/1506955.

3. Learn more about range and domain of the function brainly.com/question/3412497

Answer details:

Grade: High School

Subject: Mathematics

Chapter: Ratio and proportion

Keywords: function, relation table, same relation, set,\left( { - 6,0} \right), set of values, set of numbers, coordinates, x-coordinate, y-coordinate.

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II. This finding is significant for a two-tailed test at .01.

III. This finding is significant for a one-tailed test at .01.

d. II and III only

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1) Data given and notation    

\bar X=19.2 represent the battery life sample mean    

\sigma=2.5 represent the population standard deviation    

n=25 sample size    

\mu_o =18 represent the value that we want to test    

\alpha represent the significance level for the hypothesis test.    

t would represent the statistic (variable of interest)    

p_v represent the p value for the test (variable of interest)    

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We need to conduct a hypothesis in order to check if the mean battery life is equal to 18 or not for parta I and II:    

Null hypothesis:\mu = 18    

Alternative hypothesis:\mu \neq 18    

And for part III we have a one tailed test with the following hypothesis:

Null hypothesis:\mu \leq 18    

Alternative hypothesis:\mu > 18  

Since we know the population deviation, is better apply a z test to compare the actual mean to the reference value, and the statistic is given by:    

z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}} (1)    

z-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".    

3) Calculate the statistic    

We can replace in formula (1) the info given like this:    

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4) P-value    

First we need to calculate the degrees of freedom given by:  

df=n-1=25-1=24  

Since is a two tailed test for parts I and II, the p value would be:    

p_v =2*P(t_{(24)}>2.4)=0.0245

And for part III since we have a one right tailed test the p value is:

p_v =P(t_{(24)}>2.4)=0.0122

5) Conclusion    

I. This finding is significant for a two-tailed test at .05.

Since the p_v. We reject the null hypothesis so we don't have a significant result. FALSE

II. This finding is significant for a two-tailed test at .01.

Since the p_v >\alpha. We FAIL to reject the null hypothesis so we have a significant result. TRUE.

III. This finding is significant for a one-tailed test at .01.

Since the p_v >\alpha. We FAIL to reject the null hypothesis so we have a significant result. TRUE.

So then the correct options is:

d. II and III only

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