Question

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

A: -4
   B: -2
   C: 1
   D: 2

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

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.