A direct variation function contains the points (-9, -3) and (-12,4). Which equation represents the function?

Step-by-step explanation:

We can model this function using the equation of a line:

Where a is the slope of the line and b is the y-intercept.

To find the values of a and b, we can use the two points given:

(-9, -3):

(-12, 4):

If we subtract the second equation from the first one, we have:

Then, finding the value of b, we have:

So the equation is:

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