Question

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

A. -4
B. -2
C. 1
D. 2

Answer 1

Answer: 1) B is correct, constant of variation is -2.

Explanation:

1)

Direct variation states that a relationship between the two variables. we say y varies directly as x

i.e, or y =kx.................[1] ; where k is the constant of variation.

Given the equation:

Divide both sides by -4 we get;

Simplify:

.......[2]

On comparing equation [2] with [1] we get;

k = -2