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y is inversely proportional to x and y and 6 wh... - JAMB Mathematics 2017 Question

y is inversely proportional to x and y and 6 when x = 7. Find the constant of the variation
A
47
B
42
C
54
D
46
correct option: b

Y ∝ (\frac{1}{2})

Y = 6, X = 7

Y = (\frac{k}{x}) where k is constant

6 = (\frac{k}{7})

k = 42

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