graph b.
First, we know that when it is greater than or equal to, or less than or equal to, it is going to be a dark line, and not a doted line.
Next, check and see if the points (0, 0) fit in the equation:
2(0) + 3(0) <= 6
0 + 0 <= 6
0 <= 6 good
Graph B. has all the requirements for the solution.
Hope this helps!!
~Kiwi