Computer Graphics

Seven, the greater of the absolute coordinate differences 7 and 6.

2 × 2 − 5 = −1.

Generate the offsets about the origin, then add (h, k) to each.

Both endpoints are outside on a common side, so reject the segment.

It also considers diagonal neighbours.

(5, −1).

(−1, 3).

It reflects points across the y-axis.

Yes. Rotations about different axes generally do not commute.

Yellow.