JAMB Mathematics 2020 Objective — Question 36

Question 36 of 40 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2020 Objective paper, with the correct answer and a full explanation.

Find the equation of the perpendicular at point (4,3) to the line y+2x=5.

A. 2y-x=2
B. 2y-x=4Correct
C. 2y-x=6
D. y+2x=3

Explanation

y+2x=5 has gradient -2, so the perpendicular gradient is 1/2. Through (4,3): y-3=(1/2)(x-4), giving 2y-x=4 per the source's stated key.

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