Problem 34 of 7
Use a test point to decide which side to shade for y <= -x.
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substitute test point.
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Test point must not lie on the boundary.
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Solution
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1. Pick a point not on the boundary, often (0,0).
2. Substitute it into the inequality.
3. If true, shade that side; if false, shade the other side.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Using a boundary point as test point.