Base on you info, a 5 mph wind would drift the bullet .23 inchs at 100 yards, .47 @ 10 mph, .70 @ 15 mph, and .94 @ 20 mph.
That's an estimate, I don't know your altitude, hum. etc. but all else being equal its linear in the way you're looking at it.
There is a lot more to it, but there you have it.
CPT USAR Ret
USAMU Sniper School Oct '78
Distinguished Rifle Badge 1071