yotetracker,
Leads vary depending on distance to the coyote, the yotes speed, the angle the yote is running in relation to you, and even by the guy doing to shooter.
I've never had a bit of luck trying to figure things out mathmatically, what does work for me is instint. I.E. I swing on the coyote and when everything "feels" right Here is my key to building instint shooting ability. Get yourself a decent shotgun and a whole bunch of shells. Shoot skeet and sporting clays every week for several months. In addition to clays, shoot pigeons, starlings, crows with said shotgun everytime you get the chance.
At the same time, get yourself and accurate .22 and put a high magification scope on it. I use a 6-18x on my .22. Then fine a farm with a larger population of english sparrows that the farmer will let you shoot at. Leave the scope on the highest maginification level at all times. Only go for head shots. If you can find a sparrow in a scope set on 18x and hit in the head 4 out of 5 times from field positions, picking up a coyote on the run with 3-9 will be a piece of cake.
In my experience, you mind tends to combine both the rifle shooting and the shotgun shooting, making running game shooting so much easier. This only works if you let your training tell you when to shoot, if you force the shot you are still going to miss.
The last piecee of advise I will offer on this subject is something my father used to tell me in I was kid. He always said "To get good at shooting running coyotes, you have to shoot at alot of running coyote" I.E. you are going to miss alot at first, but will learn what works and doesn't work based on those misses.
Course he told me that for years till I tagged the first running coyote I ever shot at, at 140 yards at night, after he missed its mate standing broadside at 80 yards.
Take care and good hunting,
Matt