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postnew [5]
1 year ago
12

A scatterplot consists of (1, 4.0), (2, 3.3), (3, 3.8), (4, 2.6), and (5, 2.7). The line of best fit used to model the data is y

= –0.33x + 4.27. Which residual plot is correct? A graph shows the horizontal axis numbered 1 to 5 and the vertical axis numbered negative 2 to positive 2. Points are scattered on and below the horizontal axis. A graph shows the horizontal axis numbered 1 to 5 and the vertical axis numbered negative 2 to positive 2. Points are scattered on the horizontal axis. A graph shows the horizontal axis numbered 1 to 5 and the vertical axis numbered negative 2 to positive 2. Points are scattered on and above the horizontal axis.
Mathematics
2 answers:
zhenek [66]1 year ago
8 0

Answer:

b

Step-by-step explanation:

Phantasy [73]1 year ago
3 0

Answer:

Its the second one

Step-by-step explanation:

I got it correct

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Write an equation that represents a horizontal translation 10 units left of the graph of g(x) = |x|
Vika [28.1K]
Answer:  h(x) = |x+10|

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

Explanation:

To shift the graph 10 units to the left, we replace x with x+10. What's really going on is that the xy axis shifts 10 units to the right (because x is now x+10; eg, x = 2 ---> x+10 = 2+10 = 12) so it appears that the graph is moving to the left. The general rule is h(x) = g(x+10). 

So,
g(x) = |x|
g(x+10) = |x+10| ... every x has been replaced with x+10
h(x) = g(x+10)
h(x) = |x+10|

We can use a graphing tool like GeoGebra to visually confirm we have the right answer (see attached). Note how a point like (0,0) on the green graph moves to (-10,0) on the red graph. 

7 0
1 year ago
Read 2 more answers
From generation to generation, the mean age when smokers first start to smoke varies. However, the standard deviation of that ag
Jlenok [28]

Answer:

If we compare the p value and the significance level given for example \alpha=0.05 we see that p_v so we can conclude that we to reject the null hypothesis, and the the actual mean starting age of smokers is significantly lower than 19.      

Step-by-step explanation:

1) Data given and notation      

\bar X=18.1 represent the mean age when smokers first start to smoke varies  

s=1.3 represent the standard deviation for the sample  

\sigma=2.1 represent the population standard deviation  

n=37 sample size      

\mu_o =5.7 represent the value that we want to test    

\alpha represent the significance level for the hypothesis test.    

t would represent the statistic (variable of interest)      

p_v represent the p value for the test (variable of interest)  

State the null and alternative hypotheses.      

We need to conduct a hypothesis in order to determine if the mean starting age is at least 19, the system of hypothesis would be:      

Null hypothesis:\mu\geq 19      

Alternative hypothesis:\mu < 19      

We know the population deviation, so for this case is better apply a z test to compare the actual mean to the reference value, and the statistic is given by:      

z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}} (1)      

z-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

Calculate the statistic      

We can replace in formula (1) the info given like this:      

z=\frac{18.1-19}{\frac{2.1}{\sqrt{37}}}=-2.607      

Calculate the P-value      

Since is a one-side lower test the p value would be:      

p_v =P(z  

Conclusion      

If we compare the p value and the significance level given for example \alpha=0.05 we see that p_v so we can conclude that we to reject the null hypothesis, and the the actual mean starting age of smokers is significantly lower than 19.      

4 0
2 years ago
−15x+4≤109 OR −6x+70&gt;−2
Xelga [282]

-15x+4\leq109\qquad\text{subtract 4 from both sides}\\\\-15x\leq105\qquad\text{change the signs}\\\\15x\geq-105\qquad\text{divide both sides by 15}\\\\\boxed{x\geq-7}\\or\\-6x+70>-2\qquad\text{subtract 70 from both sides}\\\\-6x>-72\qquad\text{change the signs}\\\\6x

3 0
2 years ago
Read 2 more answers
The image shows parallel lines cut by a transversal. The expressions represent unknown angle measurements. What is the value of
Anna35 [415]

Answer:

x = 8

Step-by-step explanation:

5 0
1 year ago
Patty is building a rope ladder tree house she needs two 4 foot pieces of rope for the sides of the ladder she needs 6 pieces of
steposvetlana [31]

Answer:

15.5 feet

Step-by-step explanation:

Given:

Patty is building a rope ladder tree house she needs two 4 foot pieces of rope for the sides of the ladder.

She needs 6 pieces of rope each 15 inches long for the steps.

Question asked:

How many feet of rope does patty need to make the ladder ?

Solution:

She needs for the sides of the ladder = Two 4 foot pieces of rope

                                                                = 2 \times 4 feet = 8 feet

She needs for the steps of the ladder = 6 pieces of 15 inches long rope

                                                               = 6 \times 15 inches = 90 inches

Convert 90 inches into feet:-

12 inches = 1 feet

1  inches = \frac{1}{12} \ feet

90 inches = \frac{1}{12} \times90=\frac{90}{12} =7.5\ feet

Patty needs total rope = 8 feet + 7.5 feet

                                     = 15.5 feet

Thus, Patty needs 15.5 feet of rope to make the ladder.

6 0
2 years ago
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