English: A direct variation function contains the points (–9, –3) and (–12, –4). Which equation represents the function? y = –3x y = –y equals StartFraction x Over 3 EndFraction. y = y equals StartFraction x Over 3 EndFraction. y = 3x

A direct variation function contains the points

Ответ:

miya214

07.10.2020

Step-by-step explanation: Given that,

$(-9,-3)~\textup{and}~(-12,-4)$ are two points contained in the function. Since it is a direct variation function, so it is a straight line passing through the given points.

Let, $x_{1}=-9,~y_{1} =-3,~x_{2}=-12~\textup{and}~y_{2} =-4.$

So, slope of the line is given by

$m=\dfrac{y_{2}-y_{1} }{x_{2} -x_{1} } \\\Rightarrowc=\dfrac{1}{3}.$

The equation of the line or the function is

$y-y_{1} =m(x-x_{1} )\\\Rightarrow y+3 =\frac{1}{3}(x+9 )\\\Rightarrow3y+9=x+9\\\Rightarrow3y=x\\\Rightarrow y=\frac{x}{3}.$

Thus, (c) $y=\dfrac{x}{3}$ is the correct option.

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Ответ:

samantha9430

18.04.2021

English

sound can slow down, so when it travels through all of that it's muffled and kind of blocked. sound travels at 332 metres per second so it's hard to stop the sound

Explanation:

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A direct variation function contains the points (–9, –3) and (–12, –4). Which equation represents the function? y = –3x y = –y equals StartFraction x Over 3 EndFraction. y = y equals StartFraction x Over 3 EndFraction. y = 3x

Ответ:

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