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2 years ago

By visual inspection, determine the best fitting regression model for the data below

Mathematics

2 answers:

AVprozaik [17]2 years ago

7 0

Answer:

A) Quadratic

Step-by-step explanation: It has the U shape of a parabola which a quadratic equation has.

Lena [83]2 years ago

4 0

Answer:

The correct option is A.

Step-by-step explanation:

In a scatter plot the best fit curve in known as regression curve. Types of regression curves are

1. Linear regression line : If the best fit of a data is a straight line, then it is known as linear regression line.

2. Quadratic regression : If the best fit of a data is a U-shape curve, then it is known as quadratic regression.

3. Exponential regression : If the best fit of a data is an exponential curve, then it is known as exponential regression.

From the given graph it is clear that scatter data forms a U-shaped curve. Since the best fit of a data is a U-shape curve, therefore the quadratic regression model is best for the data.

Thus, option A is correct.

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F (x)=1000×1.8^x is the equation.

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2 years ago

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Suppose r(t)= cos(t)i+sin(t)j+(2t)k represents the position of a particle on a helix, where Z is the height of the particle abov

Gwar [14]

Answer:

The parametric equations for the tangent line are :

x = Cos(10) - t×Sin(10)

y = Sin(10) + t×Cos(10)

z = 20 + 2t

Step-by-step explanation:

When Z=20:

Z=2t=20 ⇒ t=10

The point of tangency is:

r(10)= Cos(10) i + Sin(10) j + 20 k

We have to find the derivative of r(t) to get the tangent line:

r'(t)= -Sin(t) i + Cos(t) j + 2 k

The direction vector at t=10 is:

r'(10)= -Sin(10) i + Cos(10) j + 2 k

So, the equation of the tangent line is given by:

x = cos 10 -t×Sin(10)

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z = 20 + 2t

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2 years ago

The roots of a plant reach down 3/4 inches below ground. How many inches is the plant above the

Serggg [28]

Answer:

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Step-by-step explanation:

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2 years ago

Which inequality is true for x = 20?

Makovka662 [10]

The question is incomplete. Here is the complete question:

Which inequality is true for x = 20?

A. x + 30 < 3x

B. x - 5 < 2x - 35

C. x divided by 4 < x - 12

D. 2x < x + 22

Answer:

Options A, B and D.

Step-by-step explanation:

Given:

The value of 'x' is 20.

In order to find which options are correct, we need to plug in 20 for 'x' in each of the given inequalities and check which of them hold true.

Option A:

$x+30$

Substitute 20 for 'x' in the above inequality. This gives,

$20 + 30 < 3(20)$

$50 < 60$

The given inequality is true as 50 is less than 60.

Option B:

$x-5$

Substitute 20 for 'x' in the above inequality. This gives,

$20 - 5< 2(20) - 35$

15 < 5

The given inequality is false as 5 is less than 15.

Option C:

$\frac{x}{4}$

Substitute 20 for 'x' in the above inequality. This gives,

$\frac{20}{4} < 20-12$

5 < 8

The given inequality is true as 5 is less than 8.

Option D:

$2x$

Substitute 20 for 'x' in the above inequality. This gives,

$2(20) < 20+22$

40 < 42

The given inequality is true as 40 is less than 42.

Therefore, the correct options are A, B and D.

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2 years ago

What are the next two numbers?<br> 0.41, 0.82, 1.64, 3.28, ____, ____

Anna11 [10]

Answer: 6.56, 13.12 are the correct answers

Step-by-step explanation:

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2 years ago