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Vitek1552 [10]
4 years ago
12

In a comprehensive road test on all new car models, one variable measured is the time it takes a car to accelerate from 0 to 60

miles per hour. To model acceleration time, a regression analysis is conducted on a random sample of 129 new cars. Given: R^2= 0.6960 Approximately what percentage of the sample variation in acceleration time can be explained by the simple linear model?
a. 8%
b. -17%
c. 0%
d. 70%
Mathematics
1 answer:
alekssr [168]4 years ago
4 0

Answer:

Option D is correct.

R^2 measures the fraction of the total variation in the dependent variable that is explained by the regression...

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The population of Detroit, Michigan, decreased from 1,027,974 in 1990 to 688,701 in 2013 (Source: U.S. Census Bureau). Find the
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the slope goes by several names

• average rate of change

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however, is the same cat wearing different costumes.

to get the slope of any straight line, we simply need two points off of it, so let's use the ones provided in that

\begin{array}{|cc|ll} \cline{1-2} \stackrel{years}{x}&\stackrel{population}{y}\\ \cline{1-2} 1990&1027974\\ 2013&688701\\ \cline{1-2} \end{array}\hspace{5em} (\stackrel{x_1}{1990}~,~\stackrel{y_1}{1027974})\qquad (\stackrel{x_2}{2013}~,~\stackrel{y_2}{688701}) \\\\\\ \stackrel{slope}{m}\implies \cfrac{\stackrel{rise} {\stackrel{y_2}{688701}-\stackrel{y1}{1027974}}}{\underset{run} {\underset{x_2}{2013}-\underset{x_1}{1990}}} \implies \cfrac{-339273}{23}\implies -14751\qquad \stackrel{rate~of}{change}

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A particle whose mass is 4 kg moves in xyplane with a constant speed of 2 m/s in the positive x-direction along y = 6 m. Find th
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Step-by-step explanation:

1. Angular momentum is a product of linear momentum and the distance of the object from a rotation axis.

2. Linear momentum (L) is given as :

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Where: m= mass = 4kg

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=> L = 8kgm/s

Angular momentum (A) = L x centre distance (d) of object from a rotation axis

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3 years ago
The equation of line a is y=−14x+3. If line b runs perpendicular to line a and passes through (2, 6), what would be the equation
AysviL [449]

Hint : The product of the slopes of two lines perpendicular to each other is - 1 .

______________________________

In slope-intercept ( y = ax + b ) from of the linear equations the coefficient of x is the slope of the line.

Thus :

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______________________________

Suppose that the slope of line b is x according to the Hint we have :

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Divide both side by 14

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So the slope of line b is 1/14

_____________________________

Now let's find the equation of line b by point-slope formula using the point question have us ( 2 , 6 ) :

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y - 6 = 1/14 x - 2/14

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Add both sides 6

y - 6 + 6 = 1/14 x - 1/7 + 6

y = 1/14 x - 1/7 + 42/7

y = 1/14 x + 41/7

And we're done ...

6 0
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