Hi, hope this is in the right section.
I'm going over past IGCSE paper packs, and this one is Oct/Nov 2006 Paper 4.
If someone could please take the time to help me with this graphing problem, I'd really appreciate it. So far Ive worked out :
x + y ≤ 12
x ≥ 4
Then on b, it's easy to plot the axes, but can someone please demonstrate c and d?