Solve the problem using graphical linear programming and answer the question. use simultaneous equations to determine the optimal values of the decision variables.
Z=4x1 + 3x2
Subject to
material 6x1 + 4x2 < (or =) 48 lb
labor 4x1 +8x2 < (or =) 80 hr
x1,x2 >(or =) 0