How to create function of this calculations

i have figure with several plots.

i want to calculate the y2-y1 at same axis x.

y3-y2

y4-y3

y5-y4

y6-y3

etc.

all at the same x.

after that i wnat to calculate

y3-y2/y2-y1

y4-y3/y3-y2

y5-y4/y4-y3

y6-y5/y4-y3

and soon

only that thankx

i have already my own function where

x = (0:0.5:3)%

y= a*b*c*(x)%a, b, c constant

Answer 1

[uncung fgv]

addition: if i change a value

i produce many plots at this figure.