Determining load bearing wall

[Jody Young]

I'm working on my third flip and want to open up the living space. How do most people determine if a wall separating the living room and kitchen is load bearing in a traditional rectangle shaped home?

If this wall is load bearing, I want to cut out a pass through window. However, my first preference would be to take out the whole wall.

Attached is a pic I took during one a walk through. The wall behind the chair is my target and runs perpendicular to the trusses. Thanks!