1. Give a system of inequalities for which the graph is the region between the pair of lines 8x - 4y - 4 = 0 and 8x - 4y = 0.
2. The shaded region in Fig. 9 is bounded by four straight lines. Which of the following is not an equation of one of the boundary lines?
(a) y = 0
(b) y = 2
(c) x = 0
(d) 2x + 3y = 12
(e) 3x + 2y = 12

3. The shaded region in Fig. 10 is bounded by four straight lines. Which of the following is not an equation of one of the boundary lines?
(a) x = 0
(b) y = x
(c) y = 5
(d) y = 0
(e) x + 2y = 6

4. Which quadrant in Fig. 11 contains no points that satisfy the inequality x + 2y ‰¥ 6?

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6. (5, 5) 6.