1. The problem statement, all variables and given/known data Mnimize and maximize: P=30x + 10y Subject to 2x + 2y > or = 4 6x + 4y < or = 36 2x + y < or = 10 x, y > or = 0 2. Relevant equations 3. The attempt at a solution How would I go about graphing this on my calculator: 2x + 2y > or = 4. When I take out my ti-83 and try to input the equation 2x + 2y > or = 4 I can't seem to find how to put multiple variables into it and inout less than or equal to signs in there. I do realize how to do this pblem I just can't seem to grasp the idea of how to put it into a calculator. I would greatly appreciate all your help you can provide. Thanks.