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Digiron [165]
2 years ago
14

The c and y intercept

Mathematics
1 answer:
frosja888 [35]2 years ago
6 0

y + 5 = 2(x + 1)

y - intercept \: (x = 0) \\ y + 5 = 2(0 + 1) \\ y + 5 = 2 \\ y =  - 3

<h2>Y intercept: ( 0 , -3 )</h2>

x - intercept \: (y = 0) \\ 0 + 5 = 2(x + 1) \\ 5 = 2x + 2 \\ 2x = 3 \\ x =  \frac{3}{2}

<h2>X-intercept: ( 1.5 , 0 )</h2>

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Apple launches an ad campaign for iPhone 12. Managers want to know what is the % of social media mentions that have positive rea
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Answer:

social media mentions do managers at Apple need to collect, if they want to get a margin of error of 2%

Sample size 'n' = 625

Step-by-step explanation:

<u><em>Step(i)</em></u>:-

Given data Apple launches an ad campaign for iPhone 12

Managers want to know what is the % of social media mentions that have positive reactions to the new ad campaign

probability of positive reactions p = 1/2

Probability of negative reactions q = 1-p = 1/2

we know that \sqrt{p(1-p}\leq \frac{1}{2}

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Given margin of error  = 2 % =0.02

The margin of error is determined by

          M.E = \frac{\sqrt{p(1-p} }{\sqrt{n} }

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8 0
3 years ago
Labor economists have extensively researched the determinants of earnings. Invest-ment in human capital, measured in years of ed
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Answer:

Kindly check explanation for other solutions

Years, Inning and saves are statistically significant ; ERA is not.

Step-by-step explanation:

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If ERA is reduced by 1.5 ; earning will increase by (0.0085*100)% * 1.5 = 1.275%

B.) At 5% level of confidence :

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Saves = 0.0032/0.0018 = 1.78

ERA = 0.0085/0.0168 = 0.51

Years, Inning and saves are statistically significant as they are greater than α ; As for ERA, it is not statistically significant (0.51 < 1.64)

8 0
3 years ago
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