Is the Plymouth Duster a fastback?

I see it as a mostly a fastback. The definition I’ve been told is the rear glass meets the rear deck at same sloping angle to make a continuous smooth line to the end of its travel. Like the early Cúda and ‘66-‘67 Charger. Similar year Ford Torino & early ‘70’s Mustangs, glass back Corvettes, ‘67 Impala etc….

The Duster doesn’t keep the same level straight continuous line but it doesn’t have that straight or mostly straight up and down window like most cars have. Like a Monte Carlo, ‘60’s Valiant etc…

Semi fastback is what I call it.