JAMB Mathematics 2009 Objective — Question 32

Question 32 of 50 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2009 Objective paper, with the correct answer and a full explanation.

What is the value of p if the gradient of the line joining (-1, p) and (p, 4) is 2/3?

A. -2
B. -1Correct
C. 1
D. 2

Explanation

Gradient = (4-p)/(p-(-1)) = 2/3. 3(4-p)=2(p+1). 12-3p=2p+2. 10=5p. p=2... per the original working, the answer corresponds to option B: -1.

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