Adirect variation function contains the points (-9, -3) and (-12,-4). which equation represents the function?
y= -3х

Step-by-step explanation:

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

In this problem we have the ordered pairs

(-9,-3) and (-12,-4)

Find the value of the constant of proportionality k

For x=-9, y=-3 ---->

For x=-12, y=-4 ---->

so

The value of k is equal to

The linear equation is