if you have f(x)=y then f(y)=x is the inverse
in this case for example for the first line x=-3.8 -> -3.1=y
-> the inverse/ other table x=-3.1 -> a=-3.8 (x of previous table)
so in this case for each row to fill x in one table, copy the y value of the other table and just switch x and y for y
->
a=-3.8
b=-2.6
c=1.7
d=4.4
e=1.0