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Alchen [17]
2 years ago
15

Please i need help :( What is the Y- intercept of the graph of the linear function ?

Mathematics
1 answer:
emmainna [20.7K]2 years ago
4 0

Answer:

Looks like -6

Step-by-step explanation:

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The "cold start ignition time" of an automobile engine is being investigated by a gasoline manufacturer. The following times, in
Nezavi [6.7K]

Answer:

<em>1. Sample Mean = 2.50 </em>

<em>2. Sample Variance = 1.35</em>

<em>3. Standard Deviation = 1.16</em>

Step-by-step explanation:

Note: As this question is not complete, similar can be found on internet where following are asked to calculate and here I will calculate these as well.

1. Sample Mean.

2. Sample Variance.

3. Sample Standard Deviation.

So, for sample mean to calculate from the given data points. We need to apply to following formula to calculate sample mean.

Sample Mean = (X1 + X2 + .... + XN) divided by Total number of data points.

Sample Mean = (0.17 + 1.94 + 2.62 + 2.35 + 3.05 + 3.15 + 2.53 + 4.81 + 1.92) divided by (9).

<em>Sample Mean = 2.50</em>

Likewise, from the answer of sample mean we can calculate sample variance by following steps.

<u><em>Solution: </em></u>

1.      Subtract the obtained mean from each of the data point given.

       (0.17 - 2.50) = -2.33

       (1.94 - 2.50) = -0.56

       (2.62 - 2.50) = 0.12

       (2.35 - 2.50) = -0.15

       (3.05 - 2.50) = 0.55

       (3.15 - 2.50) = 0.65

       (2.53 - 2.50) = 0.03

       (4.81 - 2.50) =  2.31

       (1.92 - 2.50) = -0.58

2.      Square each of the differences obtained in step 1.

            -2.33^{2} = 5.43

            -0.56^{2} = 0.31

               0.12^{2} = 0.01

            -0.15^{2} = 0.02

              0.55^{2}  = 0.30

              0.65^{2}  = 0.42

              0.03^{2} = 0.01

              2.31^{2} = 5.34    

           -0.58^{2} = 0.34    

3.  Sum all of these squares.

(5.43 + 0.31 + 0.01 + 0.02 + 0.30 + 0.42 + 0.01 + 5.34 + 0.34) = 12.18

4. Divide 12.18 by (n-1), where n = 9.

<em>Sample Variance =  12.18/9 = 1.35</em>

Now, by using sample variance, we can calculate standard deviation with easy simple steps.

So, in order to find standard deviation, we just need to take the square root of sample variance that we have already calculated above.

<em>Standard Deviation = </em>\sqrt{1.35}<em> = 1.16 </em>

<em>Good Luck!</em>

6 0
3 years ago
Which number is the largest?<br> A. 20.999<br> B. 21.767<br> C. 21.76<br> D. 21.80<br> E. 21.798
Elza [17]

Answer:

21.80

Step-by-step explanation:

3 0
2 years ago
help me thank you whoever is right gets brainliest A carpenter attaches a piece of plywood with a width of 4 feet and a length o
levacccp [35]

Answer:

45

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
What is this question2/3×=1/6​
pickupchik [31]
X is 1/4
2/3 X 1/4 = 1/6 make all have the same bottom number to make it easier

8/12 x 3/12 = 2/12
3 0
3 years ago
What is 6 less than a number squared written in standard form?
Naily [24]

Answer:

Youyr answer shpuld be y=x2-6.

4 0
3 years ago
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