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Molodets [167]
3 years ago
8

If y varies directly with x, find the constant of variation with x = 4 and y = -24

Mathematics
2 answers:
olganol [36]3 years ago
6 0
Use the formula y=kx for this equation.
so considering that Y equals -24 then X and K must also equal that number
we already know that X is -4 but we dont know what K is.
so we divide -24 by -4 and get an answer of a positive 6 but the answer is not proven yet.
-4 times 6 is -24 meaning that the answer is 6
Ivahew [28]3 years ago
6 0

Answer:

The constant of variation is -6.

A is correct.

Step-by-step explanation:

If y varies directly with x

y\propto x

y is directly proportional to x.

Equation: y=kx

where, k is constant of proportionality or constant of variation.

At x=4 , y=-24

Substitute x and y into equation and solve for k

-24=4k

k=-6

Hence, The constant of variation is -6.

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Answer:

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Step-by-step explanation:

Calculate the slope m using the slope formula

m = (y₂ - y₁ ) / (x₂ - x₁ )

with (x₁, y₁ ) = (4, 10) and (x₂, y₂ ) = (2, 1)

m = \frac{1-10}{2-4} = \frac{-9}{-2} = \frac{9}{2}

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Answer:

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Which comparison is not correct?<br><br>A. -2 &gt; -7<br><br>B. 1 -8<br>c. -3 &gt; -8<br>D. 6 &gt; 5
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Help with this question please!
vova2212 [387]

<em>V = 120 in^3</em>

<u><em>Here is why:</em></u>

The volume formula for a pyramid is:

V=\frac{1}{3}Bh

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The area formula for a triangle is:

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