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bazaltina [42]
3 years ago
6

A regression was run to determine if there is a relationship between hours of TV watched per day (x) and number of situps a pers

on can do (y). The results of the regression were: y=ax+b a=-0.74 b=36.359 r2=0.767376 r=-0.876 Use this to predict the number of situps a person who watches 8.5 hours of TV can do (to one decimal place)
Mathematics
1 answer:
Arturiano [62]3 years ago
6 0

Answer:

A person who watches 8.5 hours of TV can do 30.4 sit ups.

Step-by-step explanation:

The regression equation is used to predict or estimate the value of the response (or dependent) variables using the information about the explanatory (or predictor) variables.

The general form of a regression equation is:

y=ax+b

Here,

<em>y</em> = dependent variable

<em>x</em> = independent variable

<em>a</em> = intercept

<em>b</em> = slope

The regression equation representing the relationship between hours of TV watched per day (<em>x</em>) and number of sit ups a person can do (<em>y</em>) is:

y=-0.74x+36.359

Compute the number of sit ups a person who watches 8.5 hours of TV can do as follows:

y=-0.74x+36.359

  =(-0.74\times 8.5)+36.359\\=-6.29+36.659\\=30.369\\\approx 30.4

Thus, a person who watches 8.5 hours of TV can do 30.4 sit ups.

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Dovator [93]
Every angle of a square equals 90 degrees.

2x - 4 = 90              3y + 6 = 90
2x = 90 + 4              3y = 90 - 6
2x = 94                    3y = 84
x = 94/2                     y = 84/3
x = 47                        y = 28

so x = 47 and y = 28
4 0
3 years ago
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zimovet [89]
Answer:
First choice is the correct one

Explanation:
The given is:
[(x+5) / (x+2)] - [(x+1) / x(x+2)]
First, we will need to have a common denominator and then we will solve the subtraction normally. To get a common denominator, we will have to multiply both numerator and denominator of first term by x.

Therefore:
[(x+5) / (x+2)] - [(x+1) / x(x+2)] = [x(x+5) / x(x+2)] - [(x+1) / x(x+2)]
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Hope this helps :)

3 0
3 years ago
each student in ms sikes's kindergarten class has a box of crayons. each box has 36 crayons.if there are 18 students in ms sikes
UkoKoshka [18]
The answer is 648.

You have to multiply 36 by 18 to get 648

36×18 = 648

Hope that Helps :]
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3 years ago
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Answer:

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2 years ago
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PLS help!! need answers for both Part A &amp;B
Vladimir79 [104]

Answer:

Step-by-step explanation:

Part A:

3x+12+7x+88=180

10x+100=180

10×=80

X=8

Part B:

m<RPS=3x+12

(3*8)+12

=36

7 0
3 years ago
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