Answer:

Explanation:
we have that
For

so

For

so

For

so

we know that
A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form
or
In a proportional relationship the constant of proportionality k is equal to the slope m of the line and the line passes through the origin
The ordered pairs represent a direct variation
The equation is equal to

The value of k is equal to

substitute
