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3 years ago

Which rule matches the function graphed below? y= - 2x. y= x+4 y = 2x y = x -4

Mathematics

2 answers:

nikitadnepr [17]3 years ago

8 0

Take any two points to find the slope of a line. The slope will be equal to:

(y2-y1)/(x2-x1) and any two points will do...

I'll use (-2,4) and (0,0) :P so the slope is:

(0-4)/(0--2)=-4/2=-2, now we know the slope is -2 so:

y=-2x+b (now we know b=0, but I'll use another point anyway to solve for b)

Let's use (-2,4) again...

4=-2(-2)+b

4=4+b

b=0

So the line is:

y=-2x

umka21 [38]3 years ago

7 0

y=-2x
We know this because the slope is -2 (slope is found using rise/run, in this case the rise is 2 and the run is -1, so 2/-1=-2), and the y-intercept is at 0 (the y-intercept is the point at which a line crosses the y-axis).

:)

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GuDViN [60]

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3 years ago

3√x -2/x^2 please show step by step of differentiation before combining the terms.

EastWind [94]

Answer:

Step-by-step explanation:

Before we differentiate, let us assign a variable to the function. Let y be equal to the function i.e let y = 3√x -2/x²

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Applying the formula o the question given;

$y= 3\sqrt{x} -2/x^2\\y = 3{x}^\frac{1}{2} - 2x^{-2} \\\\$

On differentiating the resulting function;

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To combine the terms, we will add up by finding their LCM.

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4 years ago

Identify the solution of the system -3x -4y=2 8y=-6x-4

yarga [219]

-3x - 4y = 2
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8 8
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-3x - 4(-0.75x - 0.5) = 2
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 - 2 - 2
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 0 0
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 (x, y) = (0, 0.5)

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3 years ago

Rachel and her cousin Lena live in different cities about 100 miles apart.On the map the two cities measure 5 inches apart . Wha

Ostrovityanka [42]

On her map 1 inch is equal to 20 miles.

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