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If y varies inversely as x and x 3 when y 4 Fin... - JAMB Mathematics 2022 Question

If y varies inversely as x and x = 3 when y =4. Find the value of x when y = 12.

A

4

B

1

C

2

D

3

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Correct Option: B

Given that y is inversely proportional to x,

y = 1/x; y = \(\frac{k}{x}\)

k =xy → 3 * 4 = 12

x = \(\frac{k}{y}\) 

x = \(\frac{12}{12}\) = 1

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