Are you looking for a line?
Find the slope, first.
y = mx + b

The slope is, for every X the line travels horizontally, it travels Y vertically.
So, we take the total Y that it travels:
Point A: (-16, 14)
Point B: (3, 6)
6 - 14 = -8
It started at 14, decreased to 6, therefore it decreased a total of 8.
Now, we find how long it took for it to decrease by 8.
Point A: (-16, 14)
Point B: (3, 6])
3 - -16 = 3 + 16 = 19
So, after moving 19 units horizontally, the Y value shifted by -8.
So for every 19, it shifts -8.
In ratio form, that's -8/19 (literally, -8 for every 19).
y = (-8/19)x + b

And I'm going to stop there, 'cause I don't feel like remembering how to find B, and I assume this isn't what you're trying to do anyway, 'cause this is Algebra I material. >_>