Question

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

a) y=x-10


b) Y= X
-
-10


c) y= -10x


d) y= -10 -

p.s \\ B is x over -10

Answer 1

the answer to your question is c.

Answer 2

Option C

`y=-10x`

Explanation:

we know that

A relationship between two variables, x, and y, represent a direct variation if it can be expressed in the form
`y/x=k` or
`y=kx`

In a direct variation the constant of proportionality k is equal to the slope m

In this problem we have

`k=m=-10`

the equation of the line is equal to

`y=kx`

substitute the value of k

`y=-10x`