NumericalModerate1.5 marks
If the lines kx - y + 4 = 0 and 2y = 6x + 7 are perpendicular to each other, find the value of k.
Topic: Slope and equation of a line
Previous-year question practice database
Answer
Exam answer
k = −1/3
Explanation
Slope of kx−y+4=0 is k; slope of 2y=6x+7 is 3. Perpendicular: 3k=−1.
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