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Sophie [7]
3 years ago
5

I need help with two three and one

Mathematics
1 answer:
Mariana [72]3 years ago
6 0

We cant see the lines to be able to answer these


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A manager wishes to determine the relationship between the number of miles (in hundreds of miles) the manager's sales representa
Aleksandr [31]

Answer:

y=3.529 x +37.91

We can predict the sales representative travelled 8 miles replacing x =8 and we got:

y(8) = 3.529*8 + 37.91= 66.142

And we can predict the sales representative travelled 11 miles replacing x =11 and we got:

y(11) = 3.529*11 + 37.91= 76.729

Step-by-step explanation:

For this case we have the following data:

Miles Traveled x: 2,3,10,7,8,15,3,1,11

Sales y :31,33,78,62,65,61,48,55,120

For this case we need to calculate the slope with the following formula:

m=\frac{S_{xy}}{S_{xx}}

Where:

S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i)}{n}

S_{xx}=\sum_{i=1}^n x^2_i -\frac{(\sum_{i=1}^n x_i)^2}{n}

So we can find the sums like this:

\sum_{i=1}^n x_i =60

\sum_{i=1}^n y_i =553

\sum_{i=1}^n x^2_i =582

\sum_{i=1}^n y^2_i =39653

\sum_{i=1}^n x_i y_i =4329

With these we can find the sums:

S_{xx}=\sum_{i=1}^n x^2_i -\frac{(\sum_{i=1}^n x_i)^2}{n}=582-\frac{60^2}{9}=182

S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i)}{n}=4329-\frac{60*553}{9}=642.33

And the slope would be:

m=\frac{642.33}{182}=3.529

Nowe we can find the means for x and y like this:

\bar x= \frac{\sum x_i}{n}=\frac{60}{9}=6.67

\bar y= \frac{\sum y_i}{n}=\frac{553}{9}=61.44

And we can find the intercept using this:

b=\bar y -m \bar x=61.44-(3.529*6.67)=37.91

So the line would be given by:

y=3.529 x +37.91

We can predict the sales representative travelled 8 miles replacing x =8 and we got:

y(8) = 3.529*8 + 37.91= 66.142

And we can predict the sales representative travelled 11 miles replacing x =11 and we got:

y(11) = 3.529*11 + 37.91= 76.729

4 0
3 years ago
How much wood could woody wood pecker peck if woody wood pecker was real?
Helen [10]

Answer:

5 wood

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Determine the intercepts of the line. <br><br> 7x– 5 = 4y – 6
Liula [17]

Answer:

See steps below:)

Step-by-step explanation:

5 0
3 years ago
12 POINT HURRY PLEASE
solong [7]

Answer:

• As x approaches -∞, g(x) approaches -∞; and as x approaches ∞, g(x) approaches ∞.

Step-by-step explanation:

{ \tt{g(x) =  \frac{ {x}^{2}  + 5x}{3x} }} \\

If x approaches -∞;

{ \tt{g( {}^{ - }  \infin}) =  \frac{ {(  {}^{ - }   \infin)}^{2}  +   {}^{ - }   \infin}{  {}^{ - }  \infin} } \\  \\ { \boxed{ \tt{g( {}^{ - } \infin) =   {}^{ - } \infin  }}}

If x approaches +∞;

{ \tt{g( {}^{ + } \infin) =  \frac{ {( \infin)}^{2}  +  \infin}{ \infin}  }} \\  \\ { \boxed{ \tt{ g( {}^{ + }  \infin) =  {}^{ + } \infin }}}

Note: I'm taking my infinite value to be 1,000

7 0
2 years ago
Jullian measures the distance he drives to work each day using the odometer on his car, which measures distance in miles, accura
konstantin123 [22]

Answer:

Kindly check explanation

Step-by-step explanation: Jullian's claim that the distance she drives to work is exactly 11.7miles is incorrect because, in other to record or get the exact result of a certain calculation such as Jullian's Distance, the value of the distance obtained will not be approximated or rounded. In this scenario, Distance was to the nearest tenth of a mile, thereby altering the true outcome of the calculation.

The word exact means that what is stated is very precise and does not fall below or above in any respect. However, a number whose accuracy is to the nearest tenth of a mile, violates this assertion.

7 0
3 years ago
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