Problem 25 of 7
Use slope to prove lines through 0, 0; 3, 9 and 1, 2; 4, 11 are parallel.
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compute and compare equal slopes.
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Lines must be distinct and have equal slopes or both undefined.
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Solution
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1. Compute the slope of each line.
2. Compare the slopes.
3. Distinct lines with equal slopes are parallel.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Claiming same slope lines are parallel if they are the same line and distinctness matters.