rule being multiply by5 then subtract by 1 / rule being multiply by 2 then minus 10

1======4 1x5-1=4 5=======0 5x2-10

2======9 2x5-1=9 6=======2 6x2-10

3======14 3x5-1=14 7=======4 7x2-10

4======19 4x5-1=19 8=======6 8x2-10

NOW this one....

1========3

2========6

3========11

4========18