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Question
Solve graphically
x = −3, y = 3
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Solution
x = −3
| x | −3 | −3 | −3 | −3 |
| y | −3 | −2 | −2 | 3 |
Plot the points (−3, −3), (−3, −2), (−3, 2) and (−3, 3) in the graph sheet
y = 3
| x | −3 | −1 | 0 | 2 |
| y | 3 | 3 | 3 | 3 |
Plot the points (−3, 3), (−1, 3), (0, 3) and (2, 3) in the same graph sheet
The two lines l1 and l2 intersect at (−3, 3)
∴ The solution set is (−3, 3)
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