Oh lol.
Each line is a corner of the RAMP face and since the middle two are lower numbers the face will be sloping down. But if you make all the numbers the same the face will be flat.
Okay so, I opened up the 1x2 Ramp.BLB and noticed there are a bunch of TEX: there are Sides, BottomEdges, Top etc. Is RAMP the only one that I need?

In this image I see 1.5, -0.833, -0.833, 1.5. You said not to worry about -0.833 because they are in the middle.

I opened up a 2x2 ramp and see 7.5, -6.833, -6.833, 7.5. Once again, 7.5 is all that matters then correct?