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4 years ago

20 POINTS FOR HELP!!

Mathematics

2 answers:

uranmaximum [27]4 years ago

5 0

Y=3x+30
because if you look she automatically makes $30, and her salary goes up every time cone by 3<span />

nekit [7.7K]4 years ago

4 0

So since the first point (0,30) has an x intercept of 0 and a y intercept of 30
We can immediately eliminate any that do not have an y intercept of 30
So choices a and b are automatically incorrect

and now to solve for slope we do (y2-y1)/(x2-x1)
so we can choose any two points so I'll use points (0,30) and (1,33)

so 33-30=3
and 1-0=1

so we then do rise(y) over run (x)
and we now know our unit rate is 3x

so your answer is D

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[please help] A data set lists the grade point averages of 9th grade students. Which of the following charts could be used to di

monitta

The chart that could be used to display the data is D. Circle graph because the data is numerical

<h3>What is a circle graph?</h3>

A circle graph, also known as a pie chart, is a circular statistical visual that is divided into slices to demonstrate numerical proportion. In a pie chart, the arc length of each slice is proportional to the quantity shown. A pie chart is a graphical representation of data that takes the form of a circular chart or pie, with the slices representing the magnitude of the data. A list of numerical variables as well as category categories is required to represent data in the form of a pie chart.

A circle graph, also known as a pie chart, is a type of graph that is used to visually represent information and statistics. A circle graph is commonly used to demonstrate a study's proportionate outcomes. The arcs of a circle graph are proportional to the percentage of the population who responded to a specific question.

In this case, it can be used to show the students' grade points. Finally, D is the correct answer.

Learn more about graphs on:

brainly.com/question/24461724

#SPJ1

7 0

1 year ago

Read 2 more answers

According to a Gallup poll of 1012 people, about one-third of (32%) of Americans keep a dog for protection. Find the:Margin of E

WINSTONCH [101]

The margin of error of the proportion given is of 2.9%.
Applying the margin of error, the confidence interval is (29.1%, 34.9%).

-----------------------

The margin of error of a confidence interval of a proportion $\pi$ in a sample of size n, with a confidence level of $1-\alpha$ , is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which z is the z-score that has a p-value of $1 - \frac{\alpha}{2}$ .

The confidence interval is:

$\pi \pm M$

In this problem:

Poll of 1012 people, thus $n = 1012$ .
32% keep a dog, thus $\pi = 0.32$

95% confidence level

Thus $\alpha = 0.05$ , z is the z-score that has a p-value of $1 - \frac{0.05}{2} = 0.975$ , so $z = 1.96$ .

The margin of error is:

$M = 1.96\sqrt{\frac{0.32(0.68)}{1012}} = 0.029$

As a percent, 2.9%, as 0.029 x 100% = 2.9%.

Now for the confidence interval, which is <u>percentage plus/minus margin of error</u>, thus:

$32 - 2.9 = 29.1$

$32 + 2.9 = 34.9$

The confidence interval is (29.1%, 34.9%).

A similar problem is given at brainly.com/question/16807970

4 0

3 years ago

I’ve gotten this answer wrong twice already

sattari [20]

Answer:

Step-by-step explanation:

The standard vertex form of a quadratic (which is what your graphs are) is

$y=(x-h)^2+k$ where h and are the coordinates of the vertex. The vertex is really all we need to fill in this equation. Looking at the blue graph, the vertex is located at (-4, 1), so h = -4 and k = 1. Filling in the equation: