Hi
x >= 0, y >= 0 designates the shade area to be in the 1st quadrant
x + 3y <= 9 OR y = (-1/3)x + 3
3x + y <= 9 Or y = -3x + 9
I. Graph lines
II. shade area in the 1st quadrant below(or to the left)of both lines..
including the lines and appropiate parts of the x and y axis.