The blue curve is not correct because it outputs the lowest resistance reading at the point above idle. The red curve is correct.
I should mention that the inside of the potentiometer looks different on my car. I don't know if it is the correct one for my car but this might be the reason it gives opposite readings(less resistance when fully depressed).
1989 230E, 8v, 166.000 km, updated to 94/95 trunk & hood
2002 Daewoo Nexia 50.000 km
1987 VW Jetta GLE 16V, Recaro seats
1982 Volvo 240 DL (lovely car!)
and few more american cars.