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4 years ago

What type of line is the graph of x = −2? (1 point) HEEEEELLLPPPP!!!!!

Mathematics

2 answers:

True [87]4 years ago

4 0

Answer:

A. vertical

Step-by-step explanation:

any x=y equations will end up being vertical.

hope this helps :-)

notsponge [240]4 years ago

4 0

Answer:

a. Vertical.

Step-by-step explanation:

All points on this graph satisfy the condition that $x = -2$ . In other words, the x-coordinate of all these points are all equal to $2$ .

For example, there are

(2, 0);
(2, 1);
(2 -1).

If all the points with an x-coordinate of 2 are plotted, the result will be a vertical line that intersects the x-axis at the point (2, 0).

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Consider the following data to determine whether there is a significant difference between the values of Group 1 and Group 2. Le

cestrela7 [59]

Using the t-distribution, it is found that since the p-value of the test is 0.72 > 0.05, there is not significant difference between the values of each group.

At the null hypothesis, we test if the groups have the same values, that is, the subtraction of their means is 0:

$H_0: \mu_2 - \mu_1 = 0$

At the alternative hypothesis, we test if the groups have different values, that is, the subtraction of their means is different of 0:

$H_1: \mu_2 - \mu_1 \neq 0$

First, we have to find the mean and the standard deviation for both samples, hence, using a calculator:

$\mu_1 = 18.75, \sigma_1 = 6.2507, \mu_2 = 19.75, \sigma_2 = 4.2678$

The standard errors are:

$s_1 = \frac{\sigma_1}{\sqrt{n_1}} = \frac{6.2507}{\sqrt{8}} = 2.21$

$s_2 = \frac{\sigma_2}{\sqrt{n_2}} = \frac{4.2678}{\sqrt{8}} = 1.5089$

For the distribution of differences, we have that:

$\overline{x} = \mu_2 - \mu_1 = 19.75 - 18.75 = 1$

$s = \sqrt{s_1^2 + s_2^2} = \sqrt{2.21^2 + 1.5089^2} = 2.676$

We have the standard deviation for the samples, hence, the t-distribution is used. The test statistic is given by:

$t = \frac{\overline{x} - \mu}{s}$

In which $\mu$ is the value tested at the null hypothesis, which is 0 for this problem. Hence, the value of the test statistic is:

$t = \frac{\overline{x} - \mu}{s}$

$t = \frac{1 - 0}{2.676}$

$t = 0.37$

To find the p-value, we have a two-tailed test, as we test if the means are different from a value, with t = 0.37 and 8 + 8 - 2 = 14 df.

Using a t-distribution calculator, this p-value is of 0.72.

Since the p-value of the test is 0.72 > 0.05, there is not significant difference between the values of each group.

A similar problem is given at brainly.com/question/15682365

3 0

3 years ago

A recursive rule for a geometric sequence is a1=4/9;an=3an−1. What is the explicit rule for this sequence?

Anettt [7]

a1=4/9
r=an/a(nâ’1)=3
an=a1r^(nâ’1)=(4/9)*(3)^nâ’1

4 0

3 years ago

Read 2 more answers

If you can walk 4.9 miles in 2.9 hours, how many minutes does it take to walk 8.73 miles? Round to 1 decimal.

lisabon 2012 [21]

6.73 I believe.\

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4 0

3 years ago

1/2 (2n + 6) simply the answer and show work

Evgesh-ka [11]

Answer:

The answer is n + 3.

Step-by-step explanation:

1) Simplify.

$\frac{2n + 6}{2}$

2) Factor out the common term 2.

$\frac{2( n+ 3)}{2}$

3) Cancle 2.

$n + 3$

Therefor, the answer is n + 3.

7 0

3 years ago

Calculate the volume of a cylindrical paint can with a diameter of 3 in and a height of 8 in.

Hoochie [10]

Answer:

Volume = 18 * pi in^3 OR IF pi=3.14 THEN Volume = 56.52 in^3

Step-by-step explanation:

Volume = Area(circle) * Height

Volume = pi*(diameter/2)^2 *Height

Volume = pi* 2.25 * 8

Volume = 18 * pi in^3

And if pi=3.14 then:

Volume = 56.52 in^3

6 0

3 years ago

Read 2 more answers