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Goshia [24]
3 years ago
5

Devonte creates a scatter plot of the relationship between his hourly pay in dollars, y, and the number of customers he serves a

t a coffee shop, x. He calculates the equation of the trend line to be y=2.5x+7.
Question 1
Part A

What does the y-intercept represent?

Enter the correct answers in the boxes.

The y-intercept represents that Devonte earns $ ___ per hour when he serves ___ customers.
Mathematics
1 answer:
masha68 [24]3 years ago
8 0

Answer:

Step-by-step explanation:

What you need to do is replace x with a number like 1 or 2 in the Equation. Once you do that, you add the seven to the answer and that is your x intercept. Your y Intercept is the 7 in the equation.

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Answer:

(f/g)(5) = 22

Step-by-step explanation:

All we need to do is plug in 5 for x in both f(x) and g(x) then divide the result of f(x) and g(x) to find our final answer.

Step 1: Plug in 5 for x

f(x) = 7(5) + 4(5) = 55

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Step 2: Divide f(x) by g(x)

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And we have our final answer!

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A trucking firm has a large inventory of spare parts that have been in storage for a long time. It knowsthat some proportion of
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Answer:

0.1546\leq \widehat{p}\leq 0.3513

Step-by-step explanation:

The firm tests 75 parts, and finds that 0.25 of them are notusable

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\widehat{p}=\frac{x}{n}

\widehat{p}=\frac{19}{75}

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Confidence level = 95%

So, Z_\alpha at 95% = 1.96

Formula of confidence interval of one sample proportion:

=\widehat{p}-Z_\alpha \sqrt{\frac{\widehat{p}(1-\widehat{p}}{n}}\leq \widehat{p}\leq \widehat{p}+Z_\alpha \sqrt{\frac{\widehat{p}(1-\widehat{p}}{n}}

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Confidence interval =0.1546\leq \widehat{p}\leq 0.3513

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