Problem 31 of 7
Use slope to prove lines through 0, 0; 2, 4 and 1, 3; 5, 1 are perpendicular.
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identify negative reciprocal slopes or horizontal/vertical pair.
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Slopes must be negative reciprocals or one horizontal and one vertical.
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Solution
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1. Compute both slopes.
2. Check whether their product is -1 or one is zero and the other undefined.
3. Conclude perpendicular if the condition holds.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Equal slopes as perpendicular.