Question : (V Simple) Work out y given x.

Hello,

0<=x<=255
0<=y<=127

When x is 0 y is 127
When x is 255 y is 0

I cannot see how to solve y given x, likewise, x given y. I can see that y is half the range of x so there is a divide by 2 in there somewhere, it's fairly simple, but I cannot see it for the life of me! :(

Thanks,
Uni

Answer : (V Simple) Work out y given x.

y=127-(x*127/255)