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eimsori [14]
3 years ago
12

ASAP please help me I don’t not know how to find the Y intercept from two points

Mathematics
1 answer:
faltersainse [42]3 years ago
5 0

They way to find the y-intercept from two points is to first find the slope, which can be derived from the formula m=\frac{y_2-y_1}{x_2-x_1}.

Then, you can plug in one of the two points (x_1,y_1) or (x_2,y_2) into the formula y=mx+b to solve for b, which is your y-intercept.


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IgorC [24]
<h2><u>Answer with explanation</u>:</h2>

Let \mu be the population mean.

As per given , we have

H_0:\mu \leq4\\\\ H_a: \mu >4

Since the alternative hypothesis is right-tailed , so the test is a right-tailed test.

Also, population standard deviation is given \sigma=1 , so we perform one-tailed z-test.

Test statistic : z=\dfrac{\overline{x}-\mu}{\dfrac{\sigma}{\sqrt{n}}}

, where \mu = Population mean

\sigma = Population standard deviation

n= sample size

\overline{x} = Sample mean

For n= 18 , \overline{x}=4.50 , \sigma=1 , \mu =4, we have

z=\dfrac{4.5-4}{\dfrac{1}{\sqrt{18}}}\approx2.12

P-value (for right tailed test): P(z>2.12) = 1-P(z≤ 2.12)  [∵ P(Z>z)=1-P(Z≤z)]\

=1- 0.0340=0.9660

Decision : Since P-value(0.9660) > Significance level (0.01), it means we are failed to reject the null hypothesis.

[We reject null hypothesis if p-value is larger than the significance level . ]

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3 0
3 years ago
The average of 10 numbers is -5. A new number is added to the list making the average -6. What is the new number?
Shtirlitz [24]

Answer:

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Step-by-step explanation:

Average is calculated as

average = \frac{total}{count}

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total = - 50

let the number added be x, then

\frac{total+x}{11} = - 6 ( multiply both sides by 11 )

total + x = - 66, that is

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x = - 16

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4 0
3 years ago
HELP^^ LOOK AT THE PICTURE. this is algebra in &amp; out tables ?
s2008m [1.1K]

Answer:

a= 1 , b = 1/16  , c = 1/256 , d= 3/2 , e=4/9  , f= 16/81

Step-by-step explanation:

The first table is given as;

x         4⁻ˣ

-1        4

0        1

2       1/16

4      1/256

a= 1 , b = 1/16  , c = 1/256

The second table is given as;

x             {2/3}^x

-1             3/2

0               1

2              4/9

4              16/81

d= 3/2 , e=4/9  , f= 16/81

5 0
3 years ago
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