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3 years ago

Statistics Question. Use the Desmos graphing calculator to find the least-squares regression line for the dataset in the table:

Mathematics

1 answer:

Soloha48 [4]3 years ago

8 0

Given:

The table of values.

To find:

The least-squares regression line for the data set in the table by using the desmos graphing calculator.

Solution:

The general form of least-squares regression line is:

$\hat{y}=mx+b$ ...(i)

Where, m is the slope and b is the y-intercept.

By using the desmos graphing calculator, we get

$m\approx 2.55,b\approx -6.435$

Substitute these values in (i).

$\hat{y}=(2.55)x+(-6.435)$

$\hat{y}=2.55x-6.435$

Therefore, the correct option is A.

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Sheryl spends $17 every week on cigarettes and spends $24 a month on dry cleaning. On an annual basis, the money spent on cig

Rzqust [24]

the correct question is

Compute the total cost per year of the following pair of expenses. Then complete the sentence: On an annual basis, the first set of expenses is _% of the second set of expenses.Sheryl spends $17 every week on cigarettes and spends $24 a month on dry cleaning.

we know that

1 year is equal to 52 weeks

1 year is equal to 12 months

To calculate:

$17 * 52 = $884

$24 * 12 = $288

then

884/288 = 3.0694 * 100 = 306.94%

therefore

the answer is

306.94%

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4 years ago

L 5.2.3 Quiz: Two-Variable Systems: Substitution

Misha Larkins [42]

Answer:

We get x=3 and y=21

The ordered pair will be: (3,21)

Step-by-step explanation:

We need to use the substitution method to solve the system of equations.

$y = 10x-9\\y = x + 18$

For substitution method we substitute the value of x or y from one equation to other.

Let:

$y = 10x-9--eq(1)\\y = x + 18--eq(2)$

Putting value of y from equation 2 into equation 1

$y=10x-9\\Put\:y=x+18\\x+18=10x-9\\x-10x=-9-18\\-9x=-27\\x=\frac{-27}{-9}\\x=3$

So, we get value of x=3

Now, for finding value of y, We substitute the value of x

Find value of x from equation 2

$y=x+18\\x=y-18$

Now, putting value of x in equation 1

$y=10x-9\\Put\:x=y-18\\y=10(y-18)-9\\y=10y-180-9\\y-10y=-189\\-9y=-189\\y=\frac{-189}{-9}\\y=21$

So, we get value of y=21

So, We get x=3 and y=21

The ordered pair will be: (3,21)

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3 years ago

F(x) = x2 – 3x + 5 g(x) = V22 – 2x Calculate g (f (1)).

erik [133]

Step-by-step explanation:

So first of all we plug in 1 into f(x) and the result of that into g(x).

f(1)=(1)^2-3(1)+5

=1-3+5

g(3)=(3)(22)-2(3)

=66-6

=60

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3 years ago

Simplify expression -6-9

Ilia_Sergeevich [38]

Answer:

-6 + (-9)= -15

add the negatives

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3 years ago

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Sarah is driving. Her distance in km from Tempe after t hours of driving is given by x = D(t) = 13 + 57t.

vitfil [10]

Answer:

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3 years ago