alleryA line through (1, 2) and (3, 8) is parallel to every line of slope
- 3
- –3
- 1/3
- 6
Show answer and solution
Correct answer: A. 3
The slope is (8 – 2)/(3 – 1) = 3, and parallel lines share it.
CBSE Class 11 (Commerce) Straight Lines and Conic Sections — practice questions — page 6
Explore 152 free Straight Lines and Conic Sections questions in CBSE Class 11 (Commerce) Mathematics. Open each question or exercise to read its content, reference answers and available explanation.
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Showing questions 151–152 of 152.
Worked practice questions
The lines 2x – y + 1 = 0 and x + 2y – 3 = 0 are
- Parallel lines
- Oblique lines
- Coincident lines
- Perpendicular lines
Show answer and solution
Correct answer: D. Perpendicular lines
Their slopes are 2 and –1/2, whose product is –1.
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