ECZ 2013 · O-Level Paper 1 — Linear Programming
In the diagram, R is the unshaded region. Which three inequalities describe the region R?
- A. x >= 0, y <= -x, y >= x + 8
- B. x <= 0, y >= -x, y <= x + 8
- C. x <= 0, y <= -x, y >= x + 8
- D. x >= 0, y >= -x, y <= x + 8
Verified working — step 1
The y-axis is shaded on its right, so x <= 0. The line through (0, 0) and (-4, 4) is y = -x, shaded below, so y >= -x. The line through (-8, 0) and (-4, 4) is y = x + 8, shaded above, so y < = …The full step-by-step working and final answer are included with Premium — checked against ECZ marking standards.
Original examination question © Examinations Council of Zambia. Worked solution and commentary © G12 Titan — not to be reproduced without permission.
Have a different question?
Search it — if it is from a past paper or a school mock, chances are we have it worked out, or one that uses the same method.
Search any past-paper question