Number sequence

Question

Find number sequence and missing numbers in c & d?

 

in numbers: -4,2,9,-12,-31,19

out numbers: 14,-4,-25,38,c,d

Answer 1

(-4,14), (2,-4), (9,-25), (-12,38), (-31,c) and (19,d)

you multiply each "in" number by -3 and then add 2 to get each "out" number

-3*(-31)+2=93+2=95 for c

-3*(19)+2=-57+2=-55 for d