Hey guys, these forums have been so helpful to me, thanks to everyone who lends me a hand!

I have a few questions from some past exams that I want to understand, can't find the answers on the net.

Do homogeneous coordinates reduce the number of arithmetic operations requires to apply an affine transformation?

Do either the 'depth buffer algorithm' or the 'heedless painter's algorithm' operate at image precision?

Which of the following is not a possible number of intersections of a ray with a plane? 0, 1, 2, or +infinity.