Question

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

Answer 1

The answer to your question is c.

Answer 2

Answer:

Option C

$y=-10x$

Step-by-step 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

$y=-10x$