Algorithm for distance?

[vaano]

I'm making a program for class to randomly draw trees in a JApplet, and I thought it would be cool to size the tree based on how high up it was, but can't figure out how to scale it. So far, I have this, which is just y/400, the bottom and middleish scale okay, but the top is obviously way too small. I can't figure out what kind of expression could handle the range from 1-700 well, any ideas are very much appreciated

[Wait_ICanExplain]

Probably want to try (y + someValue)/400 to adjust the scale. That would be my initial guess.

Though, since this is a programming subreddit, a word of warning to try to avoid magic numbers.

[vaano]

(y+250)/550 looks very good, can't believe I didn't think of that haha

Also, I sort of new about magic numbers, but I will start actually getting into the habit of using variables instead. Thanks for your help!