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3 years ago

How do you do quadratic regression?

1 answer:

4 0

First Press [STAT] to access the STAT menu.
2 Scroll right to highlight the CALC menu.
3 Press [5] to select QuadReg(ax+b).
• Press [2nd] [1] [,] [2nd] [2] to input L1,L2.
• Press [,] [VARS], scroll right to highlight Y-VARS, then press [1] [1] to input ,Y1.
• Press [ENTER] to calculate the quadratic regression. This will also copy the quadratic regression equation to the Y= Editor.

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3(2x) + 3(-1) = -21 6x - 3 = -21 What property is being used ?

kaheart [24]

Distributive property, since 3(2x) you distribute and get 6x

4 0

3 years ago

A target with a diameter of 14cm has 4 scoring zones by concentric circles. The diameter of the center circle is 2 cm. The width

Leni [432]

Answer:

$48.98\%$

Step-by-step explanation:

we know that

The probability that it will hit a point in the outer (yellow) ring is equal to divide the area of the yellow ring by the total area of the target

step 1

Find the area of the yellow ring

$A=\pi [7^{2} -5^{2}]$

$A=24\pi\ cm^{2}$

step 2

Find the total area of the target

$A=\pi [7^{2}]$

$A=49\pi\ cm^{2}$

step 3

Find the probability

$24\pi/49\pi=0.4898$

Convert to percentage

$0.4898*100=48.98\%$

4 0

4 years ago

Read 2 more answers

Rewrite the equation y – 4x = –9 in slope-intercept form.

torisob [31]

Answer: y=4x-9

explanation: move the -4x over to the other side and it becomes positive 4x and -9 stays the same.

4 0

3 years ago

Read 2 more answers

What is the image of point (4, 5) after a counterclockwise rotation of 270º about the origin?

andriy [413]

A counterclockwise rotation of 270º about the origin is equivalent to a clockwise rotation of 90º about the origin.

Given a point (4, 5), the x-value, i.e. 4 and the y-value, i.e. 5 are positive, hence the point is in the 1st quadrant of the xy-plane.

A clockwise rotation of 90º about the origin of a point in the first quadrant of the xy-plane will have its image in the fourth quadrant of the xy-plane. Thus the x-value of the image remains positive but the y-value of the image changes to negative.
Also the x-value and the y-value of the original figure is interchanged.
For example, given a point (a, b) in the first quadrant of the xy-plane, a counterclockwise rotation of 270º about the origin which is equivalent to a clockwise rotation of 90º about the origin will result in an image with the coordinate of (b, -a)

Therefore, a counterclockwise rotation of 270º about the origin of the point (4, 5) will result in an image with the coordinate of (5, -4) (option C)

3 0

4 years ago

Peter is 8 years younger than Alex. In 9 years time, the sum of their ages will be 76 . How old is Alex now?

Lera25 [3.4K]

Answer:

Peter is a-8 in 9 years, (a-8)+ 9+ a+ 9= 76

5 0

3 years ago

Read 2 more answers