Question

For the equation -4y = 8x , what is the constant of variation?

Answer 1

-4y = 8x

Divide both sides by -4

y = -2x

This is in the form of y = kx, where k is the constant of variation.
y = kx is the direct 

That means, k = -2. 

The constant of variation is B. -2.

Answer 2

Answer: B: -2

Step-by-step explanation:

Given equation: $-4y=8x$

To make it in standard form divide both sides by -4, we get

$y=-2x$

Now this is in the standard form of y = mx, where m is the constant of variation.

$\Rightarrow\ m=-2$

Thus, the constant of variation is -2.

The constant of variation (m) is the number that associates two variables that are directly proportional or inversely proportional to each another.