Question

Which equation represents a proportional relationship that has a constant of proportionality equal to -10

Answer 1

`y = - 10x`

Explanation:

A proportional relationship has equation:

`y = kx`

where k is the constant of proportionality.

Since we are looking for a proportional relationship that has a constant of proportionality equal to -10, we have k=-10.

We substitute k=-10 into the equation to get:

`y = - 10x`

Therefore the correct choice is

`y = - 10x`