Post-UTME Mathematics 2018 Objective — Question 20
Question 20 of 20 from the Post-UTME Screening (Post-UTME) Mathematics 2018 Objective paper, with the correct answer and a full explanation.
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Which of the following lines are parallel? L1: 2x+3y=5, L2: 4x+6y=1, L3: 4x+3y=5
- A. L1 and L2Correct
- B. L1 and L3
- C. L2 and L3
- D. L1, L2 and L3
Explanation
L2 is a scalar multiple of L1's left-hand side (4x+6y is 2x(2x+3y)), so L1 and L2 have the same gradient and are parallel.
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